Hi Mike
I,ve been through all of my library and the nearest is a Vic Smeed model of the early 60s but I have to say that this example looks like a home made / scratch build of a basic river cruiser.
However from your photos it does look like a very well made plank on frame mahogany hull but I am not sure that the cabin is original as it appears not to be built to the same high standard as the hull.
To explain: the hull has some very nice lines and complex curves but the cabin is very box like and of a far simpler construction.
Having said that this is a very nice little model and one that I would like to own if only to do something with the cabin.
Thanks for listing it as I have spent an enjoyable afternoon trying to hunt it down.
Paul