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Horological Meandering

Here is what Gisbert Brunner had to say . . .

 

. . . about the Mido cal 917:


10.5"'

17 jewels

monometallic screw balance

self-compensating hairspring [as indicated in your description!]

automatic winding in one direction of the asymmetrical swinging weight

energy transmission via a ratchet

I'm guessing it resonates at 2.5 Hz by the number of hash marks; also, the crown looks to be original, as compared to the photo of a circa 1950 specimen printed in Kahlert, Mühe, and Brunner's "Wristwatches - History of a Century's Development".

Tonight, dinner will be camarones diavalo at Letty's, if I can get back in time from my weekly 3-ball tournament - thanks for the inspiration, René!

Art

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