Dive Dynamics 200M & Veteka knock-off. Servicing? Info?

[Clockwork Cupcake]

I've recently taken custodianship of a Dive Dynamics 200M dive watch from my father.

It hasn't been worn in decades and I don't want to crack it open myself to replace the battery as being a dive watch it probably needs to be done properly

Anyone have any recommendations on where I could do that in the Hampshire / Berkshire area?

I also have a watch by Veteka that dad bought me around the same time which looks like a cheap knock-off. Does anyone know anything about that?

Edited by Clockwork Cupcake on Thursday 31st July 18:59