Omega Speedmaster Chronoscope 43mm steel on steel

The Chronoscope collection has taken the legendary Speedmaster design and combined it with inspiration from OMEGA’s chronograph wristwatches from the 1940s.
This 43 mm model is crafted in stainless steel with a silvery dial. Along with a blue anodized aluminium bezel ring with its tachymeter scale, the leaf-shaped hands and Arabic numerals are also blued, with a unique “spiral” track pattern running beneath the numbers.
Most notably, the dial is printed with three distinctive timing scales in a 1940’s “snail” design, including a tachymeter scale, a pulsometer scale and a telemeter scale.
Presented on a stainless steel bracelet, the watch features a small-seconds counter at 9H, and a 60-minute and 12-hour recorder at 3H. Inside, the timepiece is driven by the OMEGA Co-Axial Master Chronometer Calibre 9908.
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.
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.
Pulsometer
A watch with a scale to measure the number of heartbeats per minute.
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.
Telemeter
This precision tool can measure exactly how far you are from something that is visible and audible, such as your distance from a lightening storm.
Time zone function
Allows the hour hand to be easily adjusted to different time zones without stopping the watch.
Transparent caseback
A transparent caseback – frequently made of sapphire – makes it possible to see the movement inside the watch.
Technical Data
Reference
329.30.43.51.02.001
Between lugs 21mm
Lug-to-lug 48.6mm
Case diameter 43mm
Case
Steel
Dial colour Silver
Crystal
Scratch-resistant sapphire crystal with anti-reflective treatment on both sides
Water resistance
5 bar (50metres / 165 feet)
Total product weight (approx.)
144 g
Calibre: Replica OMEGA 9908
Movement Type Manual-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.
Bracelet
Material Steel
Type of Clasp Foldover clasp with comfort setting