The ALT1-B (GMT) Chronograph hails directly from the military. Constructed to withstand the rigors of high altitude or undersea depths, our military watches adorn the wrists of combat personnel worldwide. The design closely mirrors the watch Bremont delivered to elite B2 'Stealth Bomber' Aircrew in 2012. Based on the ALT1-Z, it incorporates advanced elements of the Bremont chronograph range, including a modified BE-54E movement, Trip-Tick® case, Roto-Click® internal bezel, and black DLC case. Black leather strap with DLC pin buckle.

Specifications:

Movement

• Modified calibre 13 ¼''' BE-53AE automatic chronometer
• 27 jewels
• Glucydur balance
• Anachron balance spring
• Nivaflex 1 mainspring
• 28,800bph
• 42 hour power reserve
• Bremont moulded and decorated rotor

Functions

• Hour/minute/second
• Date at 3H
• Chronograph small counters with seconds 30 minutes and 12 hours

Case

• Hardened stainless steel Bremont Trip-Tick® construction with scratch resistant DLC treated case barrel
• Case diameter 43mm, lug width 22mm, case thickness 16mm.

Case Back

• Stainless steel with integrated flat crystal, 5 stainless steel screws with polished heads
  

Dial & Hands

• Metal dial with various ground colours
• Coated nickel hands with Super-LumiNova® C3 luminous coating

Crystal

• Domed anti-reflective, scratch resistant sapphire crystal.

Water Resistance

• 10 ATM, 100 metres

Ratings & Certification

• Chronometer rated to ISO 3159 standard