Housed in a 43mm case (unlike the 39mm BC-S1's), these automatic chronometers are powered by the modified and Bremont workshop finished BE-36AE movement, based on the 2836. Like the BC-S1, the BC-S2 is inspired by some of the original wartime aircraft instruments. It has a day-date at the 6 o'clock position, and a 43mm Trip-Tick® three-piece case hardened to 2000 Vickers using Bremont's BVE-2000 technology. Waterproof to 100m (10 ATM), dual anti-reflective domed sapphire crystal (and a crystal case-back), the series is available in three different dial colours.