Beginner question. Thanks in advance.
I was gifted a vintage 1999 GMT master Rolex. I wound the watch and accurately set the time several days ago. I have been wearing the watch several hours a day for the past few days. Today, after wearing the watch for about an hour, I noticed that it was off by 5 hours. I timed 60 seconds on the watch and it appears to still be running accurately.
My assumption is that the watch lost power and stopped and that I should have wound it before I put it on today. When I started wearing it today it gave the watch a charge and then it started up again (at the wrong time). Is that a fair assumption? Or is there a bigger problem?