Accompanied by a Girard-Perregaux wooden presentation box and pamphlets from Girard-Perregaux. Additionally a pamphlet from the Buenos Aires retailer Mauricio Girard. The box contains an extra crystal.
The Three Golden Bridge tourbillon has become Girard-Perregaux's most prestigious innovation and their most famed of productions. The patent for it was filed in the United States on March 24th of 1884 (Patent No. 14919).
'Be it known that I, Girard-Perregaux of Chaux-de-Fonds, Republic of Switzerland have invented and produced a new and original Design of a Watch-Movement, of which the following is a full, clear and exact description....In a watch movement the design for a bridge, consisting a bridge having a central annular portion, spread-out ends and bar-like portions between the said annular portions and ends, as shown....'
Ernest Guinand (c1810-1879) was an important master watchmaker from Le Locle, who, together with the famous Auguste Grether, specialized in the production of tourbillon carriages. Guinand supplied his tourbillons to renowned watchmakers such as Girard-Perregaux.
Although his carriages were often not signed, they are easily identified by their distinctive A-shaped frames (see Reinhard Meis, Das Tourbillon, p. 43, Z44 "Guinand 1"). They were mostly fitted with pivoted detent escapements, such as the present watch, some with lever escapements.