Mach Watch Concorde Air Speed GMT

Double Tap 6 to Unlock Tap Functions / Single Tap to Lock tap functions.

Tap Centre to Zoom. Multi

Tap between 1 and 2 to advance GMT Hand 1 Hr.

Tap between 10 an 11 to reduce GMT Hand 1 Hr.

3 to adjust Brightness.

Tap LH Sub Dial to Start/Pause/Stopwatch - double tap to Reset.

The hands park out of the way, revert when stopwatch reset.

9 to toggle Dim - Auto / On / Off.

12 to toggle hour and minute indices - On / Off.

Second Hand Battery Reserve in Dim.