1950s Croton Clamshell Valjoux-92

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koimaster
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1950s Croton Clamshell Valjoux-92

Post by koimaster » April 29th 2019, 9:55am

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Rare and charming chronograph by Croton. It features amazingly preserved "Clamshell" waterproof case of a very special design patented in the mid-30s by Schmitz Freres SA. This case has 4 small screws behind the lugs to compress the two parts of the case. Various Swiss manufacturers used this design for their chronographs in various sizes from 30 to 38 mm.

This particular piece is notable for the mid-sized "clamshell" case which measures 35 mm without the crown, extremely attractive two-tone dial showing beautiful patina perfectly blue steel hands, and a reliable Valjoux 92-based movement. It is signed 4 times (double signed case, movement, dial). Another interesting feature - the signature is printed in an unusual part of the dial - at 6 o'clock rather than 12 o'clock. A true gem for a true collector!

Fully functional. Technical warranty: 1 year.


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Case:
◦Stainless steel 2-body "clamshell" patented case (Brevet 189190)
◦Outstanding unpolished condition and sharp edges.
◦35 mm (without crown) / 40 mm (lug-to-lug) / 18 mm (between lugs)
◦Original steel fluted crown. Original "mushroom" pushers.
◦Original plexiglass crystal.
◦Signed "Croton" and with patent number.

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Movement:
◦Manual-winding 2-reg 45-minutes chronograph
◦Valjoux 92 correctly signed "Croton Cal.380"
◦17 jewels, 18000 A/h, 39 hours of power reserve, no shock-protection.
◦Service history is unknown. Timegrapher shows acceptable results: +4 seconds a day, 235 degrees of amplitude and 3 ms of beat error.

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Dial:
◦Original untouched two-tone dial showing uniform aging
◦Signed "Croton" and "Swiss" at 6 o'clock.
◦Original blue steel hands in good condition with intact radium-based lume
◦Excellent overall condition

Delivery set:
◦The watch with hand-made tan calfskin strap.
◦Our company’s warranty certificate, invoice and general terms and conditions.

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https://www.ebay.de/itm/1950-Croton-Cla ... true&rt=nc



From David Lawrence of Gallet -

This Croton example used the same exact same case as the Gallet MultiChron 30M Clamshell from the early 1950's. Notice the same faceted lugs. The Clamshell was so popular due to its water resistance that Gallet's production numbers exploded during these years. What began at about 15k units per year quickly rose to over 100k as the Gallet factory began private-label Clamshell manufacturing for Harvard, Croton, Bucherer, Breitling, and a number of other brands. When you needed a replacement crystal (PA470) for your Breitling, it still arrived in an envelope marked GALLET.
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1946-2006

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MKTheVintageBloke
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Re: 1950s Croton Clamshell Valjoux-92

Post by MKTheVintageBloke » April 29th 2019, 12:44pm

The movement is in poor shape. The wheel train is dark yellow-ish, which means it wasn't serviced for ages. The whole movement has a ton of filth and debris on it.
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Re: 1950s Croton Clamshell Valjoux-92

Post by conjurer » April 29th 2019, 9:58pm

smellody wrote:
artman wrote:That's a nice watch, but not 3 grand nice. Hell no.


For three grand, the Merm will provide you with an 18k watch, matching cufflinks, and a 48" gator belt.


Well, a 55 inch belt. But, otherwise, yeah.
I find tv watches to be like the guys who raise their truck you need a fricken ladder to get in. It’s a attempt to look cool... that’s all.

--Hawkeye
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