Usually 1.55 volts ask the supplier.
I'm going to change the quartz in my watch for another try at eliminating the stopping problem I have. I've seen the correct physical size on ebay and got the specs but there is nothing telling me the correct voltage which may well be the issue with the one I'm replacing as it's not original.
Any ideas on how I'd find it out??
Usually 1.55 volts ask the supplier.
That's the info I was sent though.