I found Gemtime about 2 years ago. I have been going there exclusively since. John is extremely smart in his trade. I have had watches repaired, links removed, and batteries replaced. He will honestly tell you whether a watch is worth the cost of a repair or if you should just replace it. True customer service here! John is so personal that I have found myself stopping by to just say Hi. Having done so much business with him...I now consider him a friend and not just a business that I patronize. It is close in my neighborhood so very convenient. He also has a very friendly dog named 'big'. Big occasionally 'works' with John at the shop. :)
I would trust John with any watch I own from a simple Invicta or Timex to my Rolex.
Give him a shot...and you to will soon find you have a 'friend' in the watch business.