Clocks: various pocket watches, and details of their mechanisms. Engraving c.1861.

1 print : engraving

Horology. Fig.1.-Johnson's "Universal seconds watch." Fig.2.-Johnson's keyless motion. Fig.3.-Kullberg's keyless motion. Fig.4.-Dent's balance. Figs.5,6.-Kullberg's balances. Fig.7.-Ordinary compensating balance. Fig.8.-Cole's pendulum suspender. Bears number: Plate 3. Vol. 7.

Wellcome Collection 46039i