MOVADO. A RARE AND UNUSUAL OVERSIZED 18K WHITE GOLD MANUAL WIND WRISTWATCH WITH CURVED RECTANGULAR CASE Model: Polyplan Reference: 4009 Date: Circa 1920 Movement: Curved 15-jewel manual wind, four adjustments, No.400851 Dial: Silvered, black outlined Arabic numerals, black outer minute track with 5 minute markers, subsidiary seconds at 6, blued steel dagger hands Case: Polished highly curved hinged, winding crown at 12, No.400851 Strap/Bracelet: Tan lizard leather Buckle/Clasp: Associated steel buckle Signed: Case, dial & movement Size: 21mm x 55mm - Weight: 51,70gr 注脚 According to Movado the Polyplan was launched extraordinarily early in wristwatch history in 1912 and was already lightyears ahead of its competition in design and technical advancement. The Movado Polyplan housed a movement based on three planes enabling the case to become highly curved. The running wheels were fitted to the center plate, a large balance wheel enabling improved accuracy to the lower plate angled at 25 degrees and the winding barrel to the upper plate, also fitted at 25 degrees. The Polyplan was available in silver, 14k gold and 18k gold cases in two sizes, the regular 'mini' tonneau shape case and the large curved rectangular 'maxi' case; due to the excessive costs of production the Polyplan was discontinued with a suggested manufacture not exceeding 1500 examples. The model offered in an 18k white gold full size maxi case is the rarest combination available of this model. It is interesting to note that the case has a hint of yellow due to the early manufacture and high content of gold to nickel when producing 18k white gold. The condition makes this one of the best examples we have seen.