The Art of American Horology Part ll,...

Roosevelt Hotel, Madison Avenue @ 45th Street, Dec 04, 2002

LOT 642

Waltham Mass., U.S.A., No. 26561394, Model 1908, "Vanguard" Grade, circa 1927.Very fine and rare, gold-filled, keyless, 23-jewels Railroad watch with a 24-hour winding indicator and Lossier's Inner Terminal Hairspring.

C. Three-piece, "bassine et filets" by "Keystone" using J. Boss patent, screwed bezel and back with engine-turned borders. D. triple-sunk white enamel with bold and oversized Arabic numerals, outer minute ring, up and down indicator at 12 o'clock. subsidiary sunk seconds. Blued steel "Double Swell Spade" hands. M. 16 size, nickel, 3/4 split plate with mocked bridge, damascened, 23 jewels, the top ones in raised gold settings, straight line lever escapement with sapphire pallets, cut bimetallic cmpensation balance with gold screws adjusted to 6 positions and temperature, blued steel Breguet balance spring with outer and inner Lossier terminal curves, Ohlson's patented micrometric regulator.Signed on dial, case and movement.Diam. 51 mm.