Rolex Datejust references, every generation from the 1601 to today

Anyone shopping for a pre-owned Datejust soon meets a string of numbers: 1601, 16233, 116234, 126200. Behind each of these references sits a generation of its own, with its own movement, its own crystal and its own details. Because so many Datejusts look almost identical from the outside, the reference number is the most reliable key to placing a watch.

This article is a map of Rolex Datejust references. You will learn how a reference is built, which series exist, what changed from one generation to the next and how to establish the production year of a watch. For a broader introduction to sizes, bracelets and dials, see the Rolex Datejust guide.

Why the reference matters when buying a pre-owned Datejust

The Datejust has been made almost without interruption for decades, and its basic face has barely changed. For buyers on the secondary market that means an enormous choice from every era, but also that two watches which look identical in a photograph can be far apart technically. A Datejust with an acrylic crystal and a movement without quickset date is a different watch, in daily use and in servicing, from a modern example with sapphire crystal and a long power reserve.

The reference answers the most important questions at a glance. It tells you which movement to expect, which crystal, which material and which era the watch comes from. If reference, dial, bezel and bracelet do not match, that is a reason to look more closely. And finally, the generation shapes the price. Older five-digit references generally sit below the modern six-digit ones on the market, while well-preserved four-digit pieces follow a valuation of their own, driven by collectors.

How to read a Rolex Datejust reference

From the five-digit era onwards, Datejust references follow a clear logic. The leading digits identify the line and the generation, the last digit the material. For the Datejust it pays to remember four final digits. A 0 stands for stainless steel, a 1 for Everose Rolesor, steel combined with Rolex's rose gold, which only appears in the more recent generations. A 3 stands for yellow Rolesor and a 4 for white Rolesor, where the fluted bezel is made of white gold. A 16233 is therefore a steel and yellow gold Datejust, a 16234 its sister with a white gold bezel.

The bezel often leaves a trace in the reference too. Within the 16200 series, the 16200 has a smooth bezel, the 16220 an engine-turned one and the 16233 and 16234 a fluted one. The full system, including solid gold models and other families, is explained in the article on understanding the Rolex reference number.

The dial, incidentally, never carries the reference, only the model name, which on the Datejust usually reads Oyster Perpetual Datejust. The reference is engraved on the case between the lugs at twelve o'clock, visible once the bracelet is removed, and is also stated in the papers.

The beginnings of Datejust history, the 4467 and the 1601

The history of the Datejust begins in 1945 with reference 4467. Rolex presented it to mark the fortieth anniversary of the company, as an automatic wristwatch with the date shown in a window at three o'clock. It also introduced the Jubilee bracelet, whose name refers to that anniversary and which remains the Datejust's classic companion to this day. The Cyclops lens over the date followed only in the early fifties. The 4467 and the early references of the years that followed are now firmly collectors' pieces that call for a very practised eye.

For most buyers the accessible vintage world begins with the 1601. This four-digit reference was made from the late fifties to the late seventies and defined the look of the fluted-bezel Datejust for a long time. Two features are typical of this era. The crystal is acrylic, domed and sits visibly proud of the bezel. And the date cannot be set separately, it only changes when the hands are turned past midnight. That is not a flaw, simply part of its character. Acrylic scratches more easily than sapphire but can be polished or replaced. On a 1601, value rests above all on an untouched dial, original hands and a case that has not been over-polished.

The 16000 series, sapphire crystal and quickset date

The five-digit era began in the late seventies with the 16000 series. Typical examples are the 16013 in yellow Rolesor and the 16014 with a white gold bezel. Two innovations make this generation the first Datejust in today's sense. A flat sapphire crystal replaced the acrylic one and is far more scratch-resistant. And the new calibre 3035 brought the quickset date, which lets you set the date directly via the crown without moving the hands.

As a transitional generation, the 16000 series stayed in the range for only around a decade. It often receives less attention on the market than its successors, which makes it interesting for buyers who want older character combined with sapphire and quickset. As with any older movement, it should be clear before purchase when the watch was last serviced.

The 16200 series, the classic Datejust with calibre 3135

The late eighties brought the generation that many still call the classic Datejust. It includes the 16200 with a smooth bezel, the 16220 with an engine-turned bezel, the 16233 in yellow Rolesor and the 16234 with a white gold bezel. Inside works the calibre 3135, one of the longest-serving movements in Rolex history. It is regarded as robust and easy to service.

From the outside, the 16000 and 16200 series look very similar. The difference lies mainly in the movement and in the engraving between the lugs. Within the 16200 series a few details help with closer dating. Early examples have lug holes drilled through the side of the case for the spring bars, later ones do not. Until towards the end of the nineties hands and indices were lumed with tritium, then with Luminova and finally with Super-LumiNova. The bracelets of this generation have hollow, folded end links, which often show a little play on well-worn pieces.

If you are looking for a Datejust 36 from the mid-nineties or from around the turn of the millennium, you will almost always land in this generation. The 16233 in particular is widely found on the market. It combines the classic Rolesor look with a sapphire crystal and a proven movement, and is generally priced below the modern generations.

The six-digit Datejust 36, 116200 and 126200

In the mid-noughties the Datejust 36 moved into the six-digit era. The 116200 series, with references such as the 116233 and 116234, kept the proven calibre 3135 but gained a revised case and a noticeably more solid bracelet with solid end links. During this generation the engraved inner bezel ring arrived, with the Rolex name repeated around it and the serial number at six o'clock.

In the late 2010s came the 126200 series, the Datejust 36 that is still current today. It includes, among others, the 126200 in steel with a smooth bezel, the 126233 in yellow Rolesor and the 126234 with a white gold bezel. The real innovation lies in the movement. Calibre 3235 with the Chronergy escapement offers a power reserve of around 70 hours, enough for the watch to survive a weekend off the wrist. Visually the 116200 and 126200 series are closely related, so the reference remains the surest way to tell them apart.

Choosing between the two is mainly a balance between price and the latest movement. If you would like the day of the week spelled out alongside the date, the sister line is covered in the Rolex Day-Date guide.

Datejust 41, from the Datejust II to the 126300 series

For a long time the Datejust was a 36 mm watch. In the late noughties Rolex added a larger variant, initially called the Datejust II and belonging to the 116300 series. It measured 41 mm, had a broad bezel and strong lugs and had a correspondingly bold presence. In the mid-2010s it was succeeded by the Datejust 41 of the 126300 series. It keeps the same diameter but has a slimmer bezel and finer lugs, which brings its proportions closer to the classic 36. It too runs on calibre 3235.

The Datejust II is the more striking, broader watch, the Datejust 41 the more balanced one. The difference is clearer on the wrist than in photographs.

Datejust 31, from the Rolex 68273 to the 278273

Between the Lady-Datejust and the classic 36 sits the 31 mm line, often called the midsize. Its references read as a clear chain, here using the yellow Rolesor version as the example. At the start of the five-digit era stands the 68273 with calibre 2135. It was followed by the 78273, which carried the line through the turn of the millennium. The 178273 marked the six-digit generation, powered by calibre 2235. The current 278273 runs on calibre 2236 with its silicon hairspring.

The final digit 3 indicates yellow Rolesor throughout. Much as with the 16233, the 68273 is an accessible route to a classic Rolesor Datejust, here in a smaller size.

Lady-Datejust references, from 26 to 28 mm

The Lady-Datejust follows the same system, with base numbers of its own. The four-digit 6917 belongs to the older vintage era. The 69173 opened the five-digit generation, powered by calibre 2135, the same movement as in the 68273. Next came the 79173 with calibre 2235, then the six-digit 179173. Up to this point the Lady-Datejust measured 26 mm, which explains the frequently searched term Datejust 26. With the 279173 it grew to 28 mm, powered by calibre 2236.

The versions with a white gold bezel end in 4 accordingly, such as the 69174 or the 79174. How to choose between sizes, bracelets and dials on the Lady-Datejust is covered in the Lady-Datejust guide. If the older women's references interest you, vintage Rolex for women puts the classics in context.

All Rolex Datejust generations at a glance

The first table summarises the generations of the Datejust 36.

Generation	Typical references	Calibre	Key change	Era
First Datejust	4467	early automatic movement	date in a window, Jubilee bracelet	from 1945
Four-digit era	1601	no quickset date	acrylic crystal, fluted bezel	late fifties to late seventies
16000 series	16013, 16014	3035	sapphire crystal, quickset date	late seventies to late eighties
16200 series	16200, 16220, 16233, 16234	3135	long-serving movement, later Luminova instead of tritium	late eighties to mid-noughties
116200 series	116233, 116234	3135	revised case, solid end links	mid-noughties to late 2010s
126200 series	126200, 126233, 126234	3235	around 70 hours power reserve	since the late 2010s

The second shows the larger and smaller lines.

Line	References	Size	Distinguishing features
Datejust II	116300 series	41 mm	broad bezel, strong lugs
Datejust 41	126300 series	41 mm	slimmer bezel, calibre 3235
Datejust 31	68273, 78273, 178273, 278273	31 mm	calibre 2135, later 2235 and 2236
Lady-Datejust	6917, 69173, 79173, 179173	26 mm	calibre 2135, later 2235
Lady-Datejust 28	279173	28 mm	calibre 2236

How to tell the production year of a Datejust

The reference narrows down the era, but it does not reveal the exact year. That is the job of the serial number. On older Datejusts it is engraved between the lugs at six o'clock, on more recent watches on the inner bezel ring. Up to the end of the noughties, serial numbers can be matched to a production period fairly reliably. After that Rolex assigned them at random, so for modern watches the warranty card is the main point of reference. With the tool to check a Rolex serial number you can quickly narrow down the production year of an older Datejust, for instance if you want to know when a 16233 or a 68273 was made.

What matters is that reference, serial number and details agree. Discrepancies are not automatically a problem, since parts are often replaced during a service. A watch from the tritium era with Luminova on the dial may well carry a service dial, which affects its collector value but hardly its value as a watch to wear. A selection of pre-owned Datejusts from various generations can be found in the Rolex men's watches and Rolex women's watches collections.

Rolex Datejust at Time Boutique

You will find Datejust watches from several generations, from five-digit classics to current references, in our collections for women and men. Every watch is inspected in our own workshop in Munich.

Our collection changes constantly. If you are looking for a particular reference, bezel or dial, we will find it for you. Get in touch.

For your own Datejust, we offer service and overhaul and purchase.

Frequently asked questions

When was the first Rolex Datejust released?

The first Datejust appeared in 1945 as reference 4467, marking the fortieth anniversary of Rolex. The Jubilee bracelet was introduced alongside it. The basic idea, the date in a window at three o'clock, has remained unchanged ever since.

Which reference is a Rolex Datejust 36 from the nineties?

A Datejust 36 from the nineties almost always belongs to the 16200 series, as a 16200, 16220, 16233 or 16234. It runs on calibre 3135 and has a sapphire crystal and a quickset date. Watches from the transition in the late eighties may still belong to the 16000 series, and the engraving between the lugs settles the question.

What is the difference between the 16233 and the 116233?

Both are a Datejust 36 in yellow Rolesor with a fluted bezel, and both run on calibre 3135. The 116233 is the younger, six-digit generation with a revised case and a more solid bracelet with solid end links. The 16233 is the classic five-digit version and usually trades at a more accessible level on the market.

What is the Rolex 68273?

The 68273 is a Datejust 31 in yellow Rolesor from the five-digit era, powered by calibre 2135. Its successors are the 78273, the 178273 with calibre 2235 and the current 278273 with calibre 2236. It is a natural choice for anyone looking for a classic Datejust in a medium size.

How can I find out the production year of my Datejust?

The production year comes from the serial number, not from the reference. For older watches you can match it to a production period by using the tool to check a Rolex serial number, while for modern watches with random serials the papers are the main source. The reference then helps you check that the result is plausible.