Case Serial No.
This appears to be a 1964 Regatta 23 model. The band is marked "Finesse U.S.A. 1/20-10KT. G.F. TOP"
Posted June 3, 2020 - 7:20am
There are two possible variants within the Regatta model line. Both 'E' and 'F' look to be the same, but use a different band. Since your band does not match either, it is hard to say which variant it was originally.
I would vote for Regatta, no variant assigned, but noting the two possible.
Posted June 3, 2020 - 11:05am
Posted June 3, 2020 - 2:50pm
Posted June 3, 2020 - 5:56pm
Posted June 3, 2020 - 6:27pm