Where can i get my vintage watch serviced?? In coimbatore or erode surroundings.

Iam coming to coimbatore on friday. Im from erode, im carrying my grandfather's old hmt kailash (automatic). Which needs a new strap and the moment serviced. And his old invicta, which needs a moment service and a crystal change. I want a best and exprienced place to get it serviced in coimbatore.