40mm Polished stainless steel case.
Polished 18kt yellow gold fixed bezel ring with engraved & black filled Tachymeter scale.
Polished 18kt yellow gold screw-down crown with Rolex's patented "Triplock" triple waterproofness system, ensuring that the crown screws down against the Oyster case as securely as a submarine hatch.
Screw-down chrono buttons in polished 18kt yellow gold.
Black dial.
Black sub-dials with fine yellow gold rims.
Applied polished yellow gold index hour markers with luminous fill.
Fine printed minute/seconds & fractions of a second track.
Polished yellow gold hands - hour & minute hands with black center line & partial luminous fill.
Chronograph/Stop watch function:
Large central seconds counter hand, accurate up to 1/8th of a second.
30 minute counter sub-dial located at the 3 o'clock position.
12 hour counter sub-dial located at the 9 o'clock position.
Continuous running small seconds hand sub-dial located at the 6 o'clock position.
Rolex in-house calibre 4130, beats at 28,800 vph, contains 44 Jewels & has an approximate power reserve of 72 running the time only or 66 hours with the chronograph function running.