Duplex Pocket Watch in Silver Case by Molyneux and Sons, 1815-1830
hallmarked 1830
Duplex Pocket Watch in Silver Case by James McCabe, 1820-1833
hallmarked 1833
Movement with double wheel duplex escapement by Charles Vincent
1820
Watch with Chinese duplex escapement
Pocket Watch Mechanism by Louis Recordon, 1800-1820
1800-1820
Pocket Watch in Guilt Silver Case by Thomas Earnshaw, 1810-1824
hallmarked 1824
Duplex Pocket Watch in Gilt Silver Case by Vulliamy, 1810-1823
hallmarked 1823
Duplex watch in case
1770-1805
Ladies keyless watch with duplex escapement
1890
Duplex watch in case
1809-1868
Pocket Watch by Grandjean Pere et Fils
1830-54
Duplex with going barrel
1795
Duplex watch in triple case
1762-1800
Spring-Driven Watch Mechanism of the 'Addison' model, 1885-1895
1885-1895
Duplex watch in case
1800-1806
Duplex with compensating curb
1802-1835
Going-barrel watch movement, with duplex escapement
1801-1830
Duplex, by T. Earnshaw
1801-1829
Duplex watch in pair case
Duplex Watch Mechanism by S&C Joyce, 1805-1815
1805-1815
Pocket Watch Mechanism by Viner & Co, 1820-1840
1820-1840
Duplex watch in case
1747-1807