An exact replica of the watch in the Girard Perregaux Museum, this magnificent pocket chronometer with one minute tourbillon regulator "sous trois ponts d'or" is part of a very small series started in 1981 and planned to be produced in twenty examples (to date only 17 pieces have been completed). Fitted with a pivoted detent escapement, mounted on a one minute tourbillon carriage of the type designed by Ernest Guinand, they are identical to the original one, patented in March 1884. A period modewas acquired at auction to provide the required reference.The first of the series of these new tourbillons with three gold bridges was ready by December, 1982. An objective evaluation of that achievement can be found in the opinion of the curator of the International Museum of Horology in La Chaux-de-Fonds, Andre Curtit: "With all the severity of an experienced horology teacher, I'd say that watchmakers thirty years ago or so swore only by the achievements of the old masters of their trade. Yet with all their merits, none of them ever achieved a levelof finish on a par with this, even on their most exceptional timepieces. In a word, this Tourbillon embodies the highest degree of quality that I have ever come across in my entire career."The Tourbillon's exacting precision was further confirmed by stringent tests carried out by the Swiss Official Chronometer Testing Authority. This body issued the Tourbillon a pocket chronometer rating certificate inscribed with the mention "particularly good results". This impressive performance was matched by every other Tourbillion in the series.From a North American Collector