An early 19th Century full plate gilt keywind rack lever movement. Gilt dust cover inscribed “Patentees. Fusee and chain, Harrison's maintaining power. Chased and engraved cock inscribed “Patent” on the foot, bell shaped table, diamond endstone, blue steel Bosley regulator. Plain three arm steel balance with blue steel spiral hairspring. English rack lever escapement, adjustable slides to the lever pivots, large thirty tooth escape wheel. White enamel dial with Roman numerals, gilt hands.