I'm sure you mean, have you fully wound the mainspring;)....and with a 70hr power reserve, at least 40 full turns of the winding crown from an unwound spring would bring you up to a good starting...
Type: Posts; User: Nealywheelie
I'm sure you mean, have you fully wound the mainspring;)....and with a 70hr power reserve, at least 40 full turns of the winding crown from an unwound spring would bring you up to a good starting...