Grossmann type detent escapement chronometer Circa 1885

Gold open faced pocket chronometer
–
A German 18 carat gold open faced pocket chronometer with Grossmann type detent escapement, circa 1885. Retailed by Armando Tixier, Rosario. 3/4 Plate gilt finished movement, screwed gold chatons, chain fusée, Grossmann type spring detent escapement with gold escape wheel, bimetallic compensation balance with gold poising screws, blued steel hairspring, ruby endstone, index regulator, finely engraved floral and foliage decorated balance cock and foot. Gold cuvette engraved Relojeria de la Marina Armando Tixier & Ca. Rosario, Cronometro. White enamel dial with Roman numerals and sunken subsidiary seconds. Case engine turned to the back, centred by engraved initials JGO, inside back cover with engraved inscription Jorge G. Ortiz 19. Octubre 1888. Case numbered, cuvette and dial signed by retailer, movement numbered under the dial.
–
Diameter: 54 mm
–
Signed: No name