a circular protractor by Thomas Mason, c.1820, in brass, divided to half a degree, engraved 'T Mason Essex Bridge Dublin', diameter 15.1cm; with a brass caliper engraved 'Yeates & Son, Dublin', c.1835, graduated in 1/16ths inch, in pine case, caliper 23cm
Sold for £250
Result plus buyers premium
a circular protractor by Thomas Mason, c.1820, in brass, divided to half a degree, engraved 'T Mason Essex Bridge Dublin', diameter 15.1cm; with a brass caliper engraved 'Yeates & Son, Dublin', c.1835, graduated in 1/16ths inch, in pine case, caliper 23cm
Auction: Fine Scientific and Medical Instruments, 12th May, 2022