Datejust 31 278240 Reference 278240-0018
Datejust 31
Overview
The Rolex Datejust 31 278240 comes in a 31 mm Oystersteel case with a blue dial. Inside is the self-winding Rolex calibre 2236, which has a 55 hour power reserve. The watch is water resistant to 100 metres. This model is listed with 2 references.
- Case diameter
- 31 mm
- Movement
- Calibre 2236
- Water resistance
- 100 m
- Power reserve
- 55 h
Specifications
Specifications from the1916company.com. Last checked . SourcesCase
- Diameter
- 31 mm
- Material
- Oystersteel
- Crystal
- Sapphire, Cyclops lens over the date
- Water resistance
- 100 m
- Bezel
- Domed
Dial
- Colour
- Bright blue
Movement
- Calibre
- Rolex 2236
- Type
- Automatic
- Power reserve
- 55 h
Bracelet or strap
- Bracelet or strap
- Jubilee, five-piece links
- Clasp
- Concealed folding Crownclasp
Not yet recorded: thickness, lug width, lug-to-lug, case back, shape, indexes, hands, functions, years.
Other versions of the Datejust 31 278240
The Rolex Datejust 31 278240 covers 2 references, with a 31 mm case. All use the Rolex calibre 2236.
Each version
278240-0006
Oystersteel · 31 mm
View specifications278240-0018
Blue dial · Oystersteel · 31 mm
View specifications
Compare all 2 references in a table
| Reference | Dial | Case | Size | Produced |
|---|---|---|---|---|
| 278240-0006 | – | Oystersteel | 31 mm | – |
| 278240-0018 | Blue | Oystersteel | 31 mm | – |
Datejust 31 278240 questions
What size is the Rolex Datejust 31 278240?
The Rolex Datejust 31 278240 has a 31 mm case.
What movement does the Rolex Datejust 31 278240 use?
It uses the Rolex calibre 2236.
What is the Rolex Datejust 31 278240 case made of?
The case is oystersteel.
Is the Rolex Datejust 31 278240 water resistant?
It is rated to 100 m.
How many Rolex Datejust 31 278240 references are there?
Our database lists 2 references.
About the Rolex Datejust
Rolex introduced the Datejust in 1945 to mark the company's 40th anniversary. It was the first self-winding chronometer wristwatch to show the date in a window on the dial. The original model combined the waterproof Oyster case with the Jubilee bracelet, which was introduced alongside it, and was launched in a 36mm case, still regarded as the classic size. The Datejust is offered today in sizes from 28mm to 41mm in steel, Rolesor and solid gold, with fluted or smooth bezels and a choice of Oyster or Jubilee bracelets.
