Hi Mark,
I think they changed to the big S-W speedo in the 5" hole alloy top yoke for the '56 season, '55 would have had that iron yoke. That's based on the catalog(ue) pictures on RE-indian.com
I have also seen a picture of a later Fury with the same iron yoke and twin clocks bracketed on via the holes you describe. This one came up for sale in the UK last year.
Photo: Facebook
My GUESS is that the '56 type use screw-in rather than plain top forks on the Woodsman, is this the case?
A.