A large early 20th Century American lever in a silver full hunter case. Full plate damascened nickel keyless movement, going barrel with snailed steel winding wheels. Plain cock with diamond endstone, gold micrometer regulator. Compensation balance with blue steel overcoil hairspring. Club foot lever escapement. Screwed in jewelling, gold settings and screws, escape and lever pivots with endstones. Signed white enamel dial with subsidiary seconds, black Arabic numerals for the hours, red for minutes, blue steel hands. Substantial engraved silver full hunter case, vacant arch shaped cartouche on the front cover. Silver cuvette, gold hinges, maker’s mark "Dueber" in a rectangle.