SOLD - Highly Sought After Vintage 1930 Hamilton Pocket Watch Caliber 992E Elinvar
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$1,200.00
$1,125.00
$1,125.00
per item
Have you been wanting a Hamilton 992E Elinvar Caliber? Don't settle for just good. Here we have a very exclusive 992E with an extremely clean movement that has just been serviced; keeping great time, and a perfect dial. In fact, the only thing (and it's not a flaw) I can find on this hard to make double sunk dial, is that it shows its age with some patina around the edges of the where the dial is sunken in. The movement is really super clean with nice wide Geneva stripes and excellent high-end finishing. Hamilton took great pride in the Railroad grade 992E, because it was Hamilton that was one of the fist American watchmakers to offer an Elinvar alloy balance spring, and they weren't cheap. There are no personal engravings on this piece, and the 14k white gold filled case is in excellent condition with just a tiny scuff noted on the reverse. As all true Railroad watches, this is a lever set movement. The early serial number, near mint condition and high craftsmanship of this Hamilton 992E, makes it one of the best pocket watches we have offered for sale in our collection.
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Elinvar
Elinvar is a nickel-iron alloy notable for having a modulus of elasticity which does not change much with temperature changes. The name is a contraction of the French elasticité invariable (elastically invariable). It was invented by Charles Édouard Guillaume, a Swiss physicist who also invented Invar, another alloy of nickel and iron with very low thermal expansion. Guillaume won the 1920 Nobel Prize in Physics for these discoveries, which shows how important these alloys were for scientific instruments.
Elinvar originally consisted of 52% iron, 36% nickel, and 12% chromium.[1] It is almost non-magnetic, and corrosion resistant.
Other variations of the elinvar alloy are
Elinvar is a nickel-iron alloy notable for having a modulus of elasticity which does not change much with temperature changes. The name is a contraction of the French elasticité invariable (elastically invariable). It was invented by Charles Édouard Guillaume, a Swiss physicist who also invented Invar, another alloy of nickel and iron with very low thermal expansion. Guillaume won the 1920 Nobel Prize in Physics for these discoveries, which shows how important these alloys were for scientific instruments.
Elinvar originally consisted of 52% iron, 36% nickel, and 12% chromium.[1] It is almost non-magnetic, and corrosion resistant.
Other variations of the elinvar alloy are
- Iron- and cobalt-based ferromagnetic elinvar alloy
- Manganese- and chromium-based anti-ferromagnetic elinvar alloy
- Palladium-based non-magnetic elinvar alloy
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Grade: 992E
Manufacturer:Hamilton Manufacturer Location:Lancaster, Pennsylvania Movement Serial Number:2586269 Grade:992E Model:1 To Finishing Dept:Oct 6, 1930 Run Quantity:11,700 Total Production:63,900 Size:16s Jewels:21j Jewel Material:Ruby Jewel Setting:Gold Settings (Screw-Set) Movement Configuration:Openface Movement Finish:Nickel Finish Pattern:Damaskeened Movement Setting:Lever Plate:3/4 Plate Double Roller:Yes Balance Type:Monometalic Center Wheel Material:Gold Regulator:Micrometer Hairspring:Elinvar Pallet Jewel Material:Sapphire Standard Dial Type:Double-Sunk Adjusted:Yes Adjusted # of Positions:5 Adjusted to Temperature:Yes Railroad Grade:Yes |
