I recently inherited this watch from my father. I think he probably purchased it in the 1960s (possibly in Celon/ Sri Lanka in 1962).
If I "charge" it, by wearing it for several hours, and then place it static on a table, it runs for about 50 hours. But I am unable to wind it up manually as the crown will not turn clockwise.
Note: If I pull the crown out it works perfectly to set the time.
I would greatly appreciate any information on the watch, inputs on why I am unable to manually wind it up, advice on how this might be resolved and whether this is likely to be an expensive repair please.
Many thanks!