A Beautiful 1960’s Stainless Steel Omega Constellation Chronometer With A Pie Pan Dial And Rarer 564 Cal Movement With Pull-Date, the cal 564 - 24 jewels movement with date window which is actuated quickly by pulling the adjuster out is in very good working order and keeping good time, movement no: 25661368, the stainless steel screw back case signed with the famous observatory logo on outside back - measures 40mm lug to lug and 35mm across not including the signed crown - inside caseback bears the omega watch co. Triangle and name - fab. Suisse - serial number 14900 sc-61 35mm.