I recently purchased a used Sinn 757 Diapal. I havent had a Automatic watch in over 30 years and at that point never kept a watch long enough to require service. I have traced my 757's origins back and I am at least the 6th owner of this watch and Sinn told me the watch was sold in 2008 by its serial number. So my watch is now at least 5 years old which is what they show as there warranty time period for this model.
The watch works perfectly and keeps great time. The copper sulfate drying capsule color is lite blue in color so I know thats doing fine. I know to do it right when I need service I will need to send it back to Sinn in Germany for service because of the gas that needs to be put back in to the watch.
I figure I will wait till the watch isnt keeping good time any more before I send it in. Then I will have it serviced and also get a spa treatment to make it look like new again. Is this the correct thought process or do some of you have them serviced at specific time intervals before something starts to go wrong?
I want to make sure that I dont ruin anything by waiting too long between servicing etc.
Any input from the experts is appreciated. ;)