SPECIFICATIONS
MovementST19 / ST1901 for chronograph, ST17 for other models
CaliberST19 / ST1901 for chronograph, N/A for ST17 specific model
Case size38 mm (official chronograph reissue), Variable (ST17-based watches)mm
Case material316L stainless steel
Case shapeRound
Thickness14 mm for chronograph reissue, ≈3.2 mm for ST17 movementmm
Lug width18 mmmm
CrystalSapphire for official chronograph, Variable for others
Dial colorChampagne / gilt-toned for official chronograph, Variable for ST17 watches
ComplicationsHours, minutes, chronograph with 30-minute counter and flyback for ST1901; Hours, minutes, small seconds for ST17, other complications are variant specific
Release year1963 (chronograph origin), 2001 (ST17 movement design)
1963 ST17
The Seagull 1963 ST17 is not an official variant. It usually refers to either the famous Seagull 1963 chronograph featuring the ST19/ST1901 movement or other models using the ST17 movement.