gilded movement, ruby cylinder escapement, gold three-arm balance with parachute suspension, flat blued steel hairspring, blued steel regulator index with polished curved extension arm for dial regulation

silver engine-turned dial, repeated secret numbered signature Breguet No. 4678 between 11 and 1 o’clock, eccentric satin finished chapters with black Roman numerals and outer pearled minute ring, chapters with crémaillère borders, off-set dial centre with damier guilloché pattern, arc-form aperture for regulation against a blued steel plate, dial edge à grains d’orge, angled cartouche signed Breguet above 12 o’clock, gold Breguet hands

20ct gold Tavernier case engine-turned à grains d’orge, bayonet fitted back with securing screw beneath front bezel, case back interior numbered B 4678 and T 4149 with Paris assay Pegasus 2 in irregular hexagonal frame (840/1000, 1819-1838), MAB beneath a triangle in lozenge cartouche for Tavernier workshop, pendant front with Paris ox head assay mark (1822-1838)

Measurements

diameter 31.7mm

depth 6.8mm

weight 21.8g

Accompaniment

With a later Breguet red morocco leather presentation case numbered 4678 to lid, turquoise velvet fitted interior, black base with gilt signature roundel Breguet & Compie quai de l’Horloge du Palais, No. 39 à Paris, numbered below 4678, accompanied by a later associated steel and gilt male key, and a Breguet 250th anniversary certificate

Purchased from George Brown at Breguet 20 June 1950.