Brockbank & Atkins, London c1820

The chronometer movement, originally cased as a pocket chronometer, has gilt plates with decorative engraved backcock and is signed Brockbank’s London No 646.

The chronometer has an Earnshaw spring detent escapement and a compensated balance. The spare holes in the movement plates indicate that the chronometer was originally fitted with a Peto cross detent escapement, an amplitude limiting device and a separate cock to hold the top of the balance spring.

The original 3-tier mahogany box has brass drop type side handles and a small ratchet winding key. Box size 5¼ x 5¼ x 5½ inches high.

Stock No. C1059