brooks4
·Is it a 4 over 63 or 4 over 61 on the inside of the clasp?
I first read a 63, but I'm no longer sure? Having had a closer look, seems to be a 61 to me now.
If the bracelet is original to the watch and dates to 1961, the other option is ref. 14755, in which case the hands would have been replaced.
So exactly as @Cuttysark says, you need to have opened the watch to know exactly what you have there...