Details
An unusual early 19th-Century circular protractor,
signed R. Spear, 27 College Green, Dublin, with braced vertical scales 0°-30° -- 5¾in. (14.6cm.) dia.; a combined protractor/linear scale -- 5½in. (14cm.) wide; and a miscellaneous collection of drawing instruments in box (3)
signed R. Spear, 27 College Green, Dublin, with braced vertical scales 0°-30° -- 5¾in. (14.6cm.) dia.; a combined protractor/linear scale -- 5½in. (14cm.) wide; and a miscellaneous collection of drawing instruments in box (3)