I'm pretty sure at this point that it is actually a 3/21, I wouldn't have a problem adapting a sr44 to fit. The electronics are straight forward enough, all it takes is the right diodes a bit of wiring and a length of the right diameter wooded doweling. But the Eveready 412 would be a bit difficult to swallow, a couple of replacement batteries would end up costing more than the meter.

On 5/28/2014 6:34 PM, steve harley wrote:
on 2014-05-28 15:53 P.J. Alling wrote
Among the used stuff is the afore Mentioned Honeywell Pentax Spotmeter, they only want about 60 bucks for it but I have no idea what battery it takes and no one in the store knows either. If you've priced a used Spotmeter you know what a bargain that is if it works and if the battery is available. So does anybody
know?

not sure which is original, but i know it's not the Spot Meter V that i have; this page (donation requested) provides manuals for two earlier ones:

Honeywell / Pentax 3-21 Spotmeter
[Honeywell] Pentax 1-21 spot light meter

the former (on first page) mentions 1.35v Duracell PX1 & 22.5v Eveready 412

the latter (on last page) mentions 1.3v Mallory RM640, Eveready 640 or equiv. and 9v Mallory 1604, Eveready 213 or equiv.

a quick search shows potential sources for all four batteries, but some are pricey



--
A newspaper is a device for making the ignorant more ignorant, and the crazy, 
crazier.

     - H.L.Mencken


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