Brass Sector by E. Culpeper, London, calibrated scales on both sides and marked Hour, Cho, Lin, Sec, Sin and TanandE. Culpeper Fecit at the hinged end, lg. 6 1/4 in
Brass Sector by E. Culpeper, London, calibrated scales on both sides and marked Hour, Cho, Lin, Sec, Sin and TanandE. Culpeper Fecit at the hinged end, lg. 6 1/4 in. See illustration page XX