Ca. Ø60mm, ca. 374g, 18K gold, dome marked: Chronometre Tourbillon No.20462, Henri Mathey Peytieu 1re Classe, glazed movement, outstanding chronometer movement with tourbillon type Guinand 1, golden wheel, wolf-toothed winding wheels, central bridge also numbered 20462, 9plications: perpetual calendar with consideration of leap years and retrograde date, year counter 01-99, moon phase, moon age, power reserve indicator and 2nd time zone, signed dial, Breguet steel hands, in excellent condition with original mahogany case with mother-of-pearl inlay. The tourbillon cage of the present watch is a typical example of the first type by Ernest Guinand and its characteristic 'A' shape (see Reinhard Meis 'Das Tourbillon', p. 43, 'Guinand 1'). Provenance: Christies 2007, sold for 133,000 Swiss Francs (source: plications and got the extremely high quality gold case, which has a large similarity to the Patek Philippe case of the famous Henry Graves, which was made around the same time. The fact that the dome is signed Henri Mathey Peytieu shows that it is a modernisation of the original tourbillon and not a conversion! The dial is also signed Mathey Peytieu. Unfortunately, it is not known which ingenious watchmaker or which importantpany carried out this modernisation. In any case, the quality is of the very highest level! ATTENTION: The hammer price includes 19% VAT. For bidders with a %.