PERRET & MARTIN, GENEVA, 18K GOLD HUNTER CASE KEYLESS POCKET CHRONOMETER WITH ONE MINUTE TOURBILLON AND DETENT ESCAPEMENT, MADE FOR THE SPANISH MARKET

The present watch impresses with its exceptionally well finished highest quality movement, superbly polished steel parts, bridges and pillar plate with an unusually elaborate pattern. It is a Le Locle Technicum ébauche, distinguished by its curved center bridge, with Auguste Grether-type 3-arm tourbillon carriage.

Auguste Grether (1817-1879) was one of the foremost tourbillon specialists of the time, the carriages with the characteristic crescents at the top and the use of the pivoted detent escapement.