A 19th-Century oxidised brass surveyor's level, signed on the telescope J & W E Archbutt, 201 Westminster Bridge Road, LONDON N 1230, with rack and pinion focusing, graduated bubble, lens cap and cross wire adjustor, on 4 screw tripod attachment, in mahogany case - 11¾ins. (29.8cm.) wide; and a lacquered brass swinging arm protractor, signed Troughton London in shaped mahogany case - 7¼ins. (18.4cm.) wide. (2)