1951 Bulova Duo Wind “F” or Thayer
Stainless Steel case back
L1 date code
SN 3877539
17 jewel 10BRC movement
L1 date code
This is one of the most frustrating identifications. This is either the Duo Wind “F” or the Thayer. I can find no difference between them. Which ever one you think it is, please explain why it’s not the other.
Both the Thayer and Duo Wind “F” ads are included in the pictures for your convenience.





In reply to I've always looked at it… by mybulova_admin
I know our info on Bulova isn’t complete but the last Duo Wind ad we have is from ‘52 and the first Thayer ad is also from ‘52. So I’m good with saying it was a name transition.
If what it says on the dial is the distinguishing factor, then there are 3 Duo Wind and 2 Duo Wind “F” member watches that need to be changed to Thayer.
I am showing the earliest ad for Thayer in May of 1952. Being this is a 1951 watch but missing Duo Wind on the dial this might be a transition period watch. By year I think Duo Wind F but by dial configuration Thayer. I will lean toward Thayer with Self Wind on the dial.