Case Size:

31 mm in diameter

Case Material:

Oystersteel (stainless steel)

Note: For the Yellow Rolesor version (Ref. 278273), the case combines Oystersteel and 18 ct yellow gold

Bezel:

Smooth, domed bezel in Oystersteel for Ref. 277200

(Fluted bezel in 18 ct yellow gold on Yellow Rolesor Ref. 278273)

Movement:

Calibre 2236, self-winding mechanical movement developed and manufactured by Rolex

Functions:

Hours, minutes, seconds

Instantaneous date at 3 o’clock with rapid-setting

Stop-seconds for precise time-setting

Power Reserve:

Approximately 55 hours

Bracelet Options:

Oyster bracelet (flat three-piece links) standard on 277200

Yellow Rolesor version (Ref. 278273) may feature a Jubilee bracelet (five-piece links) with concealed Crownclasp

Dial Options:

Wide variety depending on version (e.g., olive-green sunray dial with Roman numerals and diamond hour markers, pink, silver, blue, white, etc.)

Crystal:

Scratch-resistant sapphire

Cyclops lens over the date for easy reading

Water Resistance:

Waterproof to 100 metres / 330 feet

Certification:

Rolex “Superlative Chronometer” certification (COSC + Rolex in-house testing after casing)

Precision of −2 / +2 seconds per day