Large central seconds counter with the Breitling logo at the end.
30 minute counter sub-dial located at the 3 o'clock position.
12 hour counter sub-dial at the 6 o'clock position.
Fitted with a bi-directional turning bezel to operate the "Slide Rule" aka "Navigation Computer". The slide-rule allows to compute different airborne calculations such as fuel consumption, climbing times & converting miles into nautical miles or kilometers.
The bi-directional is fitted with a sophisticated rack & pinion mechanism enabling a 200 feet water resistance rating - an exceptional feat for this type of instrument.
Date window between the 4 & 5 o'clock positions.
Small seconds sub-dial at the 9 o'clock position.
Breitling Caliber 23 (COSC Certified), beats at 28,800 vph, contains 25 Jewels & has an approximate power reserve of 42 hours.