During a shed cleanout this morning, I found this little beauty.
Its a vintage dual scale voltmeter, was given to me yonks ago by my father-in-law and stored "safely" away.
Its about 2" in diameter, looks like a fob watch. There is no engraving on the chome back, though.
The lower left probe (B) is the POSITIVE for the top scale of 0-50V, the lower right probe (A) is the bottom scale is 0-10V. The fly lead is the NEGATIVE probe and is cloth insulation.
Best bit is , this little curiosity still works (tho mildly inaccurate).
cheers
Woodzy