The Art of American Horology & Colle...

New York, Nov 28, 2001

LOT 156

Ball Watch Co, "Official RR Standard", No. B801192, by Hamilton, Grade 974, finished on Dec. 21 1910, sold to Ball on April 3, 1911.Fine, white gold-filled, Railroad Grade watch.

C. three-body, screwed bezel and back, back cover engine-turned with different straight line patterns. D. white enamel, bold Arabic numerals, outer minute divisions, subsidiary sunk seconds. Blued steel Pierced Lance hands. M. 16 size, nickel, damascened in circular pattern, straight-line lever escapement, cut-bimetallic compensation balance, blued steel Breguet balance spring, swan-neck micrometric regulator.Signed on the dial, case and movement.Diam. 51 mm.