Description
Knox & Shain Wye Level for W. B. Throop: Knox & Shain Wye Level for W. B. Throop, Philadelphia, Pennsylvania, no. 916, original lacquered instrument with 16-in. scope, fine focusing knob, and spirit level below, main arm engraved "Knox & Shain/Maker/Philadelphia/No. 916, " housed in a fitted mahogany...