Sears Light Meter + what battery?

[IGMeanwell]

Hi all,

I have been hitting dead ends on my search but I found my grandfather's Sears Light Meter

The only problem there is no directions and I can't tell what battery it would use (I have the battery cap its just off in the picture)

Here are some pictures, any help will be greatly appreciated

 

[nikon_sam]

By the looks of this older meter (can someone say Gossen Luna Pro) and the size of the battery compartment I would say it takes the PX625 mercury battery...

 

[IGMeanwell]

I guess I will be ordering a weincell if I want to be using this guy ... thanks for the help!

 

[nittany1]

I have that same light meter, it takes a PX625, so that means a Wein zinc-air nowadays. The mercury PX625 are long gone.