The Art of American Horology Part ll,...

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

LOT 604

Keystone Watch Co., No. 311011, dust-proof model, circa 1888.Fine and rare, yellow-gold filled, hunting-cased, keyless watch with a patented "dust-proof" case.

USD 1,000 - 1,500

Sold: USD 1,035

C. Four body, "bassine et filets" by "Dueber", hinged covers, centered in front by flower ornamented and monogrammed crest, in back by a flying bird, hinged cuvette. D. White enamel with painted Roman numerals, outer minute ring, sunk subsidiary seconds. Blued steel "Spade" hands. M. 18 size, nickel, full plate, damascened, 15 jewels, straight line lever escapement, cut bime-tallic compensation balance with screws, blued steel flat balance-spring, Bitner patented (No. 265,568) micrometric regulaor, safety pinion. Signed on dial, case and movement, movement engraved "Pat. Reg.", "Pat. Dust Proof", "Pat. SW".Diam. 53 mm.


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Grading System
Grade: AA

Very good
Case: 4 - 15
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 3 - 13 - 01

Notes

This company evolved from Lancaster Watch Co., and in 1891, merged with Hamilton Watch Co. Its owner, Bittner was a good watchmaker who invented and patented at least six improvements to watches