To clarify what I mean about the bulwark....I cropped some pics....the mystery boat has a nice bulwark with a teak caprail, and the life line stanchions are actually on a raised fiberglass pillar, to reduce leaking I assume. Pretty cool.on the GD 28 I have only seen a regular teak toerail, and no raised fiberglass pillar.To me they do look different, but like I said, maybe I'm being to picky on the differences.
This is a bit of a longshot... but could the "mystery" boat be a "WALTON 25"? I found this ad in a December 1963 YACHTING. If not, perhaps there was a larger model from WALTON? Now that I look at the original pictures.....I guess this isn't a Walton 25.... but as I say, maybe they later came out with a larger model?