Rolex
Rolex Datejust 31 278383RBR
The Rolex Datejust 31 (reference 278383RBR) is a 31 mm Oystersteel and yellow gold watch. It runs on the automatic caliber 2236 with a 55-hour power reserve and is water resistant to 100 m.
Specifications
Case
- Reference
- 278383RBR
- Collection
- Datejust
- Case size
- 31 mm
- Case material
- Oystersteel and yellow gold
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 100 m
- Bracelet / strap
- Oystersteel and yellow gold
Dial and bezel
- Bezel
- Diamond-set
Movement
- Movement
- Automatic
- Caliber
- 2236
- Power reserve
- 55 hours
- Frequency
- 28,800 vph
- Functions
- Date
Production
- Production
- Current
Dial versions
This reference was made with these dials and finishes.
278383RBR Black
278383RBR-0024
Mother-of-pearl; Diamond-set · Diamond, Bezel, count not published; Diamond, Dial (indexes/hour markers), count not published
278383RBR Champagne
278383RBR-0014
Sunray · Diamond, Bezel, count not published
278383RBR Green
278383RBR-0029
Olive; Diamond-set · Diamond, Bezel, count not published; Diamond, Dial (indexes/hour markers), count not published
278383RBR Grey Dark grey #0017
278383RBR-0017
Dark grey; Diamond-set; Large VI · Diamond, Bezel, count not published; Diamond, Dial (large VI numeral), 11 stones
278383RBR Grey Dark grey #0022
278383RBR-0022
Dark grey; Diamond-set · Diamond, Bezel, count not published; Diamond, Dial (indexes/hour markers), count not published
278383RBR Silver
278383RBR-0020
Diamond-set · Diamond, Bezel, count not published; Diamond, Dial (indexes/hour markers), count not published
278383RBR White
278383RBR-0001
White · Diamond, Bezel, count not published
278383RBR White Mother-of-pearl
278383RBR-0028
Mother-of-pearl; Diamond-set · Diamond, Bezel, count not published; Diamond, Dial (indexes/hour markers), count not published
How it compares within the Datejust family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 278383RBR (This watch) | 31 mm | Oystersteel and yellow gold | — | 2236 | — |
| 126200 | 36 mm | Oystersteel | — | 3235 | 2018– |
| 126233 | 36 mm | Yellow Rolesor (Oystersteel/18k yellow gold) | — | 3235 | 2018– |
| 126234 | 36 mm | White Rolesor (Oystersteel/18k white gold) | — | 3235 | 2018– |
| 126284RBR | 36 mm | Oystersteel / White gold | — | 3235 | — |
| 126300 | 41 mm | Oystersteel | — | 3235 | 2017– |
| 126331 | 41 mm | Everose Rolesor (Oystersteel/18k Everose gold) | — | 3235 | 2017– |
| 126333 | 41 mm | Yellow Rolesor (Oystersteel/18k yellow gold) | Champagne / Black / Silver / Blue / Wimbledon slate / various | 3235 | 2017– |
| 126334 | 41 mm | White Rolesor (Oystersteel/18k white gold) | — | 3235 | 2017– |
About the Datejust family
The Datejust appeared in 1945 as the first self-winding wristwatch to show the date in a window, together with the Jubilee bracelet designed for it. The Cyclops magnifier over the date followed in the 1950s, and the combination of fluted bezel, date window and Jubilee bracelet has stayed the model's signature ever since.
The catalog covers several generations, from caliber 3135 references to the current 3235 models: the Datejust 41, such as refs. 126300, 126331 and 126333, and the Datejust 36, such as refs. 126200, 126233 and 126234. Variants combine steel, Rolesor and gold with smooth or fluted bezels, Oyster or Jubilee bracelets and a very wide choice of dials. For dealers the exact dial, bezel and bracelet combination is what separates otherwise similar watches, so they are always described together.
Quick answers
- What size is the Rolex Datejust 31 278383RBR?
- The Rolex Datejust 31 278383RBR has a 31 mm case.
- What movement does the Rolex Datejust 31 278383RBR use?
- It uses the automatic caliber 2236, with a 55-hour power reserve.
- How water resistant is the Rolex Datejust 31 278383RBR?
- It is water resistant to 100 metres.
- Is the Rolex Datejust 31 278383RBR still in production?
- Yes, it is a current reference.
- What is the Rolex Datejust 31 278383RBR made of?
- The case is Oystersteel and yellow gold. Bracelet or strap: Oystersteel and yellow gold.
- Which dials was the Rolex Datejust 31 278383RBR made with?
- The catalog lists 6 dials: Black, Champagne, Green, Grey, Silver, White.
Catalog facts checked October 2026.