Very nice, while we are on about watches my Tag just started its five second hand movement to indicate its battery is on the way out. Popped into a jewellers Braehead and they wanted £50 and a three week turnaround.
So took a look and this Martains does top of the line way beyond my watch and can do while I wait plus its a short drive to the other side of Glasgow. The cost to replace the cell for an origianl Tag F1 is £25.00, fully inclusive of Swiss Renata cell & testing for water-resistance to 50mts. This work can usually be completed while you wait!
Testing to 200mts and above, if required, is £35.00 and takes aprx’ 1 week.
I haven't used them, but they get a decent write up on some of the watch forums I look at.
I guess the key thing is if you want it pressure tested again to 200M - 50M basically means it's splash spoof, 200M means it won't get damaged if you properly dunk it.