| Grading System | |
|---|---|
Grade: AAA |
Excellent |
Case: 3 |
Good |
Movement: 3 |
Good |
Dial: 3-6 |
Good Slightly oxidized |
Brand Clerke
Model Marina Chronometer
Year Circa 1870
Movement No. 557
Calibre 39’’’, brass half-plate with cylindrical pillars secured by screws, fuse chain. Earnshaw type detent escapement. The compensation balance is typical, with blued steel helical balance spring with terminals.
Case No. 557
Dimensions 20 X 20 X 21 cm
Signature Case and Dial.
Accessories Original winding key
Notes
F. W. Clerke was not merely a retailer of chronometer made up for him by others in the trade. In about 1870 he designed and made a short interval timer with split seconds facility, described in the journal of the Antiquarian Horological Society for March 20007. He is recorded as working at Cornhill, London, from 1863 until 1881, and died in 1885 at the age of 65.