Interesting, thanks for posting, Mickey. Some things survive and some do not. Notably for Triumph, the apparent non survivors include the TR1 shown in 1952, and the 1959 Le Mans TRS.
As far as I can tell, and I'm certainly no expert, the above car really didn't make the literature. It appears to be a crude sister of the Dolomite and a contemporary. It will be interesting to see what what price rarity alone will bring. Of course, any kind of a link between this and the TR1 woud change things.
Tom