FS: Type 640 Mercury Battery Adapter, save your vintage equipment!

If you have a older Honeywell Pentax Spotmeter, or other equipment that
used the Type 640 Mercury battery, you need to know about this:

The Type 640 battery is no longer available - it is a mercury battery
and improper disposal is bad for the environment. The currently
marketed replacement battery of the same type number is an alkaline
type. It has a different voltage and discharge curve, which would make
devices such as camera meters inaccurate if used as a replacement.

I have a solution, please see http://www.ebiz2000.com/640MBA

Thank you.