The Ball Engineer Master II Pilot GMT GM3090C-LLFAJ-BK is a men's automatic watch known for its robust build, GMT complication, and excellent illumination.
 

• Movement: Swiss automatic BALL Calibre RR1201, based on an ETA 2893-2 movement, with 21 jewels
• Functions: Hours, minutes, sweep seconds, date display (at 3 o'clock position), and a second time zone (GMT) indicator
• Power Reserve: Approximately 42 hours (some sources indicate 38 hours)
• Case Material: Solid stainless steel, with a brushed and polished finish
• Case Diameter: 43.5 mm
• Case Thickness: Approximately 11.9 mm
• Crystal: Anti-reflective sapphire crystal (front) and an exhibition sapphire crystal case back
• Water Resistance: 100 meters (330 feet), suitable for swimming and shallow snorkeling
• Shock Resistance: 5,000Gs
• Dial Color: Black with a guilloche texture
• Illumination: 28 micro gas tubes on hands and dial for constant night reading capability; the GMT hand also uses SuperLuminova
• Bezel: Duo-directional (bi-directional) rotating, ratcheted, 24-hour bezel with an aluminum top
• Band: Black genuine crocodile leather strap with red contrast stitching
• Clasp: Traditional tang-style pin buckle