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Information and worth of an Invar watch NAWCC Message Board

May 01, 2006 · It is an average grade from appearances. The name is meaningful in the watch business, referring to the alloy Invar which is the name given to the alloy that makes watches non-magnetic, and steady timekeepers through a wide range of temperatures. Whether or not your watch has any Invar in it is open to debate.…

Invar - Wikipedia

Invar, also known generically as FeNi36 (64FeNi in the US), is a nickel–iron alloy notable for its uniquely low coefficient of thermal expansion (CTE or α). The name Invar comes from the word invariable, referring to its relative lack of expansion or contraction with temperature changes.…

Invar pocket watch - Brass Goggles

Aug 16, 2011 · Nice watch. Invar is a wonderfully odd alloy. If I remember right, one of its first commercial uses was in surveyor's chains. I used to work for a company which made a high-tech soldering iron which used an alloy similar to Invar to control when the tip was heated by current and when it wasn't.…

The Breakthrough for a - archive.amerisurv.com

Invar was the answer to this problem. Watches produced by the Invar Watch Company began appearing with the word “Invar” printed on the dial and stamped on the metal inside the case, designating a sign of quality. The Hamilton Watch Company used the name Elinvar which was stamped on the inside of their watches which utilized the Invar alloy.…

ANTIQUE Extremely Rare Solid 14K Gold INVAR Oversize 60mm ...

You are bidding on a nice ANTIQUE Extremely Rare Solid 14K Gold INVAR Oversize 60mm Case Pocket Watch Runs Great with normal sign of use. Watch is very heavy 138g and massive 14kt gold. Made between 1902 and 1906 The Invar watch company was founded in 1901 by Achille Hirsch in Le Chaux de Fonds, but they didn't' register the name until 1925Seller Rating: 99.6% positive…

An Antique Invar Silver Pocket Watch c.1917 - LA56170 ...

An antique Invar 1917 silver pocket watch that has a nicely jewelled Swiss stem-winding movement, which is working nicely. The movement is protected by an inner hinged cover.The watch itself measures 49.8mm diameter excluding the winding crown and the stem. The case is silver and there are silver import marks inside the two case backs for London 1917 with a case importers mark for George ...…