a swing-arm protractor divided to half a degree, reading to one arc-minute by vernier, with a circular example (diameter 15.3cm) divided to half a degree, both woth name and address hand-engraved in script
Sold for £138
Result plus buyers premium
a swing-arm protractor divided to half a degree, reading to one arc-minute by vernier, with a circular example (diameter 15.3cm) divided to half a degree, both woth name and address hand-engraved in script
Auction: The Collectors Sale, 23rd Feb, 2022