I hope this is the correct forum to post this. I have a Hamilton Khiki auto that was purchased new about 7-8 years ago, I believe it has a ETA 2824. It has never been serviced. It's in my rotation, and thus not worn everyday. I went to wind it and it's was a lot stiffer than usual, and was losing time. I took it to a local watch repair shop. Here are my questions:
1. The repair man said an auto/mechanical needs to be serviced every 4 years, is this true?
2. What should a ball park cost be for a servicing/oiling if no parts need to be replaced?
Thank you in advance