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Auktionen Dr. Crott 91st Auction

680 “A.IR”, Écoles d’Horlogerie Porrentruy, Case No. 1898, 57 mm, 132 g, circa 1898  A skeletonized Swiss graduate’s work with minute repeater and chronograph - with pink gold watch chain (49 g) Case: 18k pink gold, tiered, polished, gold dome, case maker’s punch mark “JFE”, slide for repeating mechanism, pusher for chronograph via crown, glazed movement. Dial: glass, radial Roman hours, auxiliary seconds, gold Louis XV hands. Movm.: bridge movement, rhodium-plated, “fausses côtes” decoration, finely ground and bevelled chronograph steel parts, ratchet wheel, 2 hammers / 2 gongs, monogram “A.IR” placed under one hammer, wolfteeth winding wheels, screw compensation balance, counterpoised lever. “A.IR”, Écoles d’Horlogerie Porrentruy — 瑞士鏤空三問獵式懷 錶,專業學校作品,附碼錶及紅金錶鍊(49 g) 40556  C: 2 D: 2 M: 2, 41  11.000 - 15.000 EUR 12.200 - 16.500 USD 99.000 - 135.000 HKD