Lovely Konica Auto S2 on EBay - problem!

[jrong]

I just got a Konica Auto S2 rangefinder off eBay, it looks in stunning condition, the leather case is immaculate and the camera itself looks to be in mint condition, hardly used. Everything seems to work, although I don't have a battery for the meter.

Apparently it uses the PX625 mercury battery - any idea where I can get hold of an equivalent?
It's only for the meter anyway, so its not the end of the world if I can't find a suitable replacement.

What is more disturbing is that when I look through the viewfinder, I can't see a yellow focusing spot to focus with. When I shift the focusing ring, the yellow frame lines move in and out, but there isn't a double image in any yellow focus spot to focus with. I'm stumped.

Any ideas?

Jin