I have recently acquired a late 70s/early 80s Imhof Swiss quartz clock (I like Imhof mechanical clocks, this is my first quartz). A problem though: it takes an odd 1.35 volt battery which is approximately the same width as a AA battery (slightly larger), about 1/3rd the length of a AA (no idea of the model # of the battery). Judging from the voltage, size, era, etc., I am just about certain that the original was a mercury, now long gone. Any ideas as to coming up with a suitable replacement. (I'm hoping that I don't have to use some sort of Zinc/Air type as using those with old cameras has been less than good...) Many thanks to all with any ideas.