Hello Ladies & Gentlemen! I own a Omega Constellation (2002 Model). It's currently not working. The problem is my dad was using the watch since 2002 and unfortunately he passed away in 2011. After that, the watch has been lying simply unused. Now a month back i took the watch and wanted to get the battery replaced. Unfortunately, The battery had leaked and there is the greenish deposit in the battery contact terminal. I asked the watch repair guy if it's possible to repair it. I'm from India and he quoted 3500 INR (56.64 $) to repair it. Then i started to search the internet and found out that you will have to service the watch every 2-3 years. Now my doubt is that i do not know if my dad had properly done the service during his ownership period. And the watch is now 12 years old. Now where do i begin? Should i just replace the battery and go about it or give it for a complete service? Btw, The place where i gave the watch is NOT AN AUTHORIZED OMEGA SERVICE CENTRE. But, That place (P Orr & Sons) is a very famous for repairing watches since 1846 here in India. Now should i give the watch to this place or take it to an authorized omega service centre? And what exactly needs to be done on the watch and how much will it cost approximately? I want to keep it carefully since now it's hold a certain sentimental value. Help me out here! Im stumped and confused.