Independent Dead Center-Seconds Thos

Independent Dead Center-Seconds Thos. W. Cooper, 7 Thavies Inn, Holborn, London, No. 3222. The case with London hallmarks for 1877-1878. Very fine and rare, two-train, 18K gold pocket watch with independent dead center-seconds. Four-body, “bassine et filet”, polished, stop-slide on the band for the center-seconds. Hinged gold cuvette. White enamel, three-piece, radial Roman numerals, outer minute track, subsidiary seconds. Blued steel spade hands. 44 mm., matte gilt three-quarter plate, two-train, 17 jewels, 8 in visible screwed gold chatons, lateral lever escapement, cut bimetallic compensation balance with gold temperature and meantime adjustment screws, large blued steel balance spring with overcoil, index regulator, foliate engraved balance cock. Dial and movement signed. Diam. 52 mm.