ETA SA caliber 6503 is a manual-winding pocket watch movement introduced in 1960. It measures 11½ lignes and features a date complication at 3:00 alongside small seconds at 9:00, with Incabloc shock protection and hacking seconds. The movement was discontinued after the 1960s. It served as the base for Guinand's HS81 caliber, which added a central sweeping seconds hand.
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Display Type
Analog
Shock Protection
Incabloc
COMPLICATIONS
Date
FEATURES
Hacking SecondsSmall Seconds
QUICK FACTS
BRAND
TYPE
Manual WindingSTATUS
DiscontinuedLAUNCH YEAR
1960COUNTRY
SwitzerlandALSO KNOWN AS
unitas 6503