I've just seen this on eBay. Any comments? What battery would it use?
https://www.ebay.co.uk/itm/Vintage-MINERS-LAMP/293307928806?hash=item444a83d0e6:g:rfQAAOSwdkNdpxum
It's an "Oldham" bottle lamp, probably 1930's to 40's vintage. Can't tell you the type number of the battery, just that it would be lead-acid and circular in shape.
To switch on and off, the top part of the lamp is rotated slightly, bringing the contacts together.
A huge number of similar lamps were Military/Naval but this does appear to be mining.
Regards, John...
Huddersfield, best value for money in the country, spend a day there & it'll feel like a week........