This little Hong Kong manufactured multimeter was in a very grubby condition when I purchased it for 55 pence. The pointer was bent and the two AA cells inside had corroded the batttery terminals. It used to belong to someone who used to work for British Rail in the 1960's. Caby Electric Works Ltd. Hong Kong.
The two alkaline AA cells fitted were an extremely tight fit in the
battery holder and part of the moulding for the left hand cell was
broken. I decided to use AAA alkaline cells and have packed out the
resulting space with two double sided self adhesive pads. The meter
works and is reasonably accurate.