Hi Mark and welcome aboard. The nearest thing to an id number will be a permanent marker scribbling in the bow behind the vinyl lining (if it's still there)that should give a clue to length/year/month/build number but not sure what order. I think all the 20's had aluminium window frames, I have a feeling deluxe may have been a hardtop version but stand to be corrected on that. There should be some brochures and stuff on the main site.
I have just got a 17 I believe. Cant find one online for a idea of value once fixed up. Any idea. I think it is the 2 from the pictures on here. How many of these were produced.