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Pentax 1/21 spot meter battery

drgoose

Member
Allowing Ads
Joined
Feb 4, 2014
Messages
115
Location
Florida
Format
4x5 Format
Hello everyone, I recently purchased a Pentax 1/21 spotmeter on eBay. I am trying to figure out which battery to use. According to a manual I found online it uses a 1.3 Volt mercury battery which are now not available and a 9 volt battery. Does anyone know which current battery I can use with it?

Thanks in advance.

Joaquin