1950 Duo Wind ?

Submitted by William Smith on December 8, 2011 - 9:52pm

Hi gang

I think this is a Duo Wind.  Hands look slightly different than those i've seen, but?  It's a Swiss 9AB, 17 jewel, date code 1950 on movement and case back.  Domed acarylic crystal, 10k RGP case/back.  SN on case 1947838 (for what ever that's worth).  Was serviced when I took the pictures.  (my watch guy hates me coming in to his shop and peering over his bench to take photos- and they don't turn out as good as at home anyway).  I'm a gonna list it in the database if the name sounds right. 

Thanks

Will

Reverend Rob
Posted December 8, 2011 - 11:18pm

 Nice. That's a Felsa Bidynator in there, an F705.  That would jive with the model name. 

William Smith
Posted December 8, 2011 - 11:38pm

Thanks Rob

I'll take your word for that, and then seceretely go try to look it up on the internet so you won't know I don't know what a Felsa Bidynator is (at least not the F705 anyway....  :).

William Smith
Posted December 8, 2011 - 11:45pm

I would guess this is denoted by the little Y like insignia.  I've seen them on other "both way"  auto winders. 

Reverend Rob
Posted December 9, 2011 - 2:28pm

 That symbol is supposed to be a downward and left pointing arrow, to show how to unlock the rotor. I like these old Autos. 

FifthAvenueRes…
Posted December 9, 2011 - 3:36pm

I was under the impression that the 9 AB was a Felsa 415

Reverend Rob
Posted December 10, 2011 - 8:43am

 The F415 had a sweep second, and was based on the F410. They are slightly larger (10.5'''-11.5''') than the F705, which is based on the F700. (9ABC, 9.25''') The 700 series had the more visible pawl winding wheel, seen on the right. 

The 11AAC was a Felsa 415. The 410-415 was the forerunner of the well known 690-699 series. 

 

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