Are European pocket watch keys the same as American keys?
Hello. I sent my Longines Ottoman Nacib Djezvedjian Constantinople pocket watch in for service to a repairman in the Midwest to take dents out of the sterling silver case. I received it back a few weeks ago but there was no key included. The repairman said he lost the key. I recall it being a number 7. He wants to give me $50.00 to replace it. My question is can I just buy any number 7 winding key or does it have to be specifically European? Thanks!