A very fine two-colour 18ct yellow and white gold open-faced keyless lever one-minute tourbillon watch with state-of-wind indication and presentation box

19’’’ half-plate Victorin Piguet ébauche, damascened decoration, going barrel, lever escapement, ruby jewels, Guillaume balance, blued steel hairspring with Breguet overcoil, precision micrometer regulation, three-arm polished steel Le Sentier-type tourbillon cage mounted on a one-minute rotating carriage
 
silver engine-turned dial, clous de Paris guilloché patterned centre, satin finished chapter rings for hours with black Roman numerals and pearled minute track, twin subsidiary seconds rings, the outer with Arabic/dot 5-second divisions, the inner pearled, crescent-form sector for state-of-wind indication from 0-30, all chapters and sector with crémaillère borders, rectangular cartouches signed and numbered Breguet 3356
 
18ct yellow gold satin finished case with white gold rims and bow, milled yellow gold band, satin finished yellow gold hinged back with polished interior, polished hinged gold cuvette signed and numbered Regulator à Tourbillon Breguet No. 3356, French eagle’s head assay marks to inner rim, back, cuvette and bow (some rubbed)
 
Measurements


diameter 52mm
depth including crystal 13.3mm
weight 140.3g


Accompaniments
 
with a red morocco leather presentation case numbered 3003 to lid, the back dyed green and having gilt lettered roundel signed Breguet & Compie quai de l’Horloge du Palais, No. 39 à Paris. Turquoise velvet fitted interior, silk lined lid concealing certificate compartment and containing Breguet Certificate no. 3559 dated 19th July 1978 for watch 3356, and a Breguet 250th anniversary certificate