Omega Speedmaster Racing 44.25mm steel on leather strap

Presented on a grey leather strap, this Speedmaster Racing Master Chronometer model features a 44.25 mm stainless steel case with an 18K Sedna gold bezel. The silicon nitride bezel ring includes the famous tachymeter scale in OMEGA Ceragold.
On the matt grey dial, there is a distinctive racing style minute-track which gives the watch its name. There are also two subdials with rhodium plated applied rings as well as a 6 o’clock date window that blends with the colour of the dial. The hour and minute hands and arrowhead indexes are 18K Sedna gold with white Super-LumiNova.
The watch is driven by the OMEGA Co-Axial Master Chronometer 9900, certified by METAS at the industry’s highest standard.
Features
Anti-magnetic
The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
Chronograph
The chronograph function is a mechanism for measuring time intervals. A chronograph watch can therefore be used to time events while displaying the time like any traditional watch.
Chronometer
Label given to a watch which has undergone precision tests and received a certificate from an official body.
Date
The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o’clock.
Master Chronometer Certified
Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology.
Small seconds
A hand on a sub-dial which tracks seconds typically it completes a full rotation in one minute.
Tachymeter
A tachymeter watch has a function for measuring speed. It is a chronograph with a graduated dial on which speed can be read in kilometres per hour based on a 1000 metre distance.
Time zone function
Allows the hour hand to be easily adjusted to different time zones without stopping the watch.
Technical Data
Reference
329.23.44.51.06.001
Between lugs 21mm
Lug-to-lug 50.0mm
Thickness 14.9mm
Case diameter 44.25mm
Case
Steel
Dial colour Grey
Crystal
Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides
Water resistance
5 bar (50metres / 165 feet)
Total product weight (approx.)
112 g
Calibre: Replica Omega 9900
Movement Type Self winding
Power reserve 60 hours
Case Measurements
1. Between lugs This measures the space where a strap or bracelet would be placed.
2. Lug-to-lug
This is the full length of the case, from the top lugs to the bottom lugs.
3. Case diameter This is the full width of the watch’s case, excluding the crown and pushers.
4. Thickness When viewed from the side, this measures from the base of the watch to the surface of the glass.
Strap
Strap color Grey
Strap type Leather strap
Strap surface Alligator leather
Strap underside Non-grained calf leather
Buckle type Foldover clasp
Buckle material Stainless steel