Daytona style chronograph watch case
Compatible with Seagull
ST1903/TY2903, ST1902/TY2902, ST1901/TY2901 movements
316L stainless steel watch case with screw down crown, screw down case back cover and screw down push crowns
Water resistance:5 ATM
Diameter: 42mm including a crown, 48mm lugs to lugs.
Case thickness: 16 mm including a crystal
Width between lugs: 20mm
Bezel diameter: 40mm
Case inside diameter: 32 mm
Diameter of internal shoulder (visible dial): 29mm
Case internal height from internal shoulder to the edge: 7mm
Height between internal shoulder and crystal: 4.5mm
Height between internal shoulder and stem hole center: 3mm
Crown diameter: 7mm
Push crown diameter: 5.3mm
I crashed with my bike and damaged the case of my Alpha Daytona. Ordered a new case the next day, got it a few days later, transferred over the movement and the watch is like new again! Great service from Alpha!
Put my st1903 from my alpha 1965 in this case today, it looks beautiful and the renewed casing makes it get wrist time again.