What time is it? Watches and horology

I've got the same kit to replace the battery in my Formula 1, it's probably not waterproof any more because the rubber around the bumpers has almost fully disintegrated so I'm not too worried about it. That said I do plan on getting a new o-ring and lube to help the case be sealed.

I was toying with your suggestion but this is the only watch I’d need it for and I don’t really wear it much. I’d also have to buy some sort of magnifying kit so in the end I just went to the bloke in Vauxhall. The watch is so old it’s never going to be fully waterproof without major work and I don’t use it for any aquatic action.
All done;