The battery in one of my watches died - the last one cost me £50 to be replaced, so I considered changing myself as the actual batteries cost less than a £1.
I tried the various methods shown on Utube without success so in the end sent off for a watch back opening tool.
There's various ones on offer for a few pounds but they looked cheap and nasty so opted to buy a better quality one from one of the few remaining Horological suppliers Meadows & Passmore.
It cost me £12 instead of £3 but looked exactly the same as the cheapos - it did come in a wooden box though.
There must be somewhere that sells quality watch tools as I cannot imagine professional repairers would use these ones - I'm a bit disappointed in M&P.
The great thing is that it did work and I've now sent off for the correct battery.
My repair won't include a pressure test but as I don't go diving and never swim wearing it, I've saved myself a few pounds.
My wife's watch has a push in back which is supposed to have a small notch, which I couldn't find, despite buying a back remover "knife" and using a magnifying glass. So had to give up on that and had the battery changed for £25.
Cannot win them all?