Previously in the L. Leroy collection. Although highly unusual and different from most other French chronometers, it is evident that it was entirely made in France. The maker of this chronometer, who unfortunatey has eluded identification, was certainly heavily influenced by the chronometer work of Motel or of Louis Berthoud, as well as by that of Breguet. The mahogany box, like the gimbal-suspension, is identical with those of Motel and Louis Berthoud. The two-barrel caliber is visibly inspired by that of Breguet. The escape wheel with teeth 'en spatule' can be compared with those of Louis Berthoud and Breguet. The winding arrangement with the square bordering the bezel, is an adaptation for two barrels of that employed by Motel. the three arm balance is virtually identical with those of Berthoud and Motel. Only the cylindrical balance spring with six turns in one direction and six in the other is original in conception and seems to be used here for the first time. A careful examination of the silver dial shows that its thickness has been reduced by some tenths of a millimeters, no doubt in order to efface the original engraving of which the only traces are parts of a 2 and 3 close to Dent' signature. The number of this chronometer fits perfectly into the number sequence of Dent's chronometers around 1853, number 2449 having been sold in 1852 and number 2459 in 1854. In view of the date (1838), found on Bourquin's springs one might suppose that Dent acquired this chronometer, probably in order to examine it, at the exhibition of the products of French Industry in 1839 or 1844. The reports of these two exhibitions unfortunately are not sufficiently detailed to allow it to be identified.