Anyone know what this was used for?
Graces Guide provides info on Elliot Brothers being an early instrumentation maker eventually moving into electrical instruments. So, possibly an aid to calibration ?
From a carpentry tool chest, wonder why would a carpenter squirrel it away wrapped in waxed paper. I am thinking it had an original as intended use, and then possibly a tradesman found another use for it later, but could be way off the mark.
Graces Guide provides info on Elliot Brothers being an early instrumentation maker eventually moving into electrical instruments. So, possibly an aid to calibration ?
From a carpentry tool chest, wonder why would a carpenter squirrel it away wrapped in waxed paper. I am thinking it had an original as intended use, and then possibly a tradesman found another use for it later, but could be way off the mark.