Vintage 1940'S Waldon WWII, Flesa Bidynator 17 jewel "bumper" automatic, Swiss incabloc wristwatch. Running great and keeping time!

We are proud to offer this rare beautiful WWII men's vintage 1940's Waldon Swiss "bumper" autowind wristwatch 17 jewel wristwatch in remarkable condition.

The the polished brass308 mm / 1.27" in diameter, excluding fancy horned lugs and crown, and features a light copper military dial that has evenly aged to a parchment color complimented by black syringe hour and minute hands, red center sweep, raised Arabic numbers, and black outer chapter, all under a bright, clear crystal.

The renowned 17 jewel,Felsa Bidynator, autowind incabloc movement sets and winds effortlessly, running strong and keeping very good time.

Please remember that all auto-wind watches must be hand wound or shaken for a short time to apply enough pressure on the mainspring to start it running. Then while wearing it, AND REMAINING ACTIVE, the normal movement of your wrist will continue to wind it.

It has a screw-down stainless steel back and is matched with a very nice black genuine alligator lizard band with gold buckle.

STOCK CODE: W-52

ABOUT THE FELSA BIDYNATOR MOVEMENT:

Bidynator

Exploded drawing of the **Bidynator** [[movement]]\\ © [[Felsa]] (click to enlarge!)
Exploded drawing of the Bidynator movement
© Felsa

Bidynator was a brand name for a series of automatic watch movements produced by Felsa from 1942 through the 1960's. It was the first successful movement with bi-directional winding.

History
Felsa became an innovator in the 1930s with designer Friedrich Meyer, who patented an automatic winding mechanism in 1942. A bi-directional winding mechanism was patented in 1947 by Meyer. Because of Felsa's successful bi-directional automatic winding system, they were allowed to specialize in automatic movements by the cartel of Swiss movement makers, Ebauches SA, along with ETA and A. Schild.

Felsa introduced their first automatic movement with bi-directional winding in 1942. Cal. 410, and the associated ladies model, Cal. 380, were revolutionary but World War II interrupted production and development. Cal. 410 was only produced for a short while before the more-refined Cal. 690 was introduced in 1947 to replace it. These movements were very similar, with many interchangeable parts, but the new series had a longer power reserve (43 rather than 32 hours) and were produced in much greater volume.


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