WoW, ean25, my old Dad will be bouncing in his coffin trying to get out. What you have there Sunbeam is only the second one I've EVER seen, the first one was in about 1955 and was our indoctrination into toy boats. Ours was glued together initially with "Croid" (It re-kitted itself) and then with "Cascamite". The coupling between the 2.46 "Racer" and the shaft was one of the original floppies, a piece of thick walled PVC tube which proceeded to snap the propshaft. This was replaced with a "Rip-Max" universal coupling (Chrome plated steel) another first and the shaft changed to Stainless. A commercial three bladed brass prop of built up construction sat on the go end and was fine tuned (The prop) with a pair of pliers from reasonably quick to WHOOOSH. It free ran in a d*mn great arc on the local park lake as RC was limited to the "Affluent" and the best combo at the time was the "Hill" hard valve receiver and a Tri-ang transmitter.
If you go across to the Model Boat site, someone over there will be exstatic to see a picky. If you can locate the original plan and instructions that came with the kit, I'd love a scan.
OH yes, before I forget, it'a an Adamcraft Seaplane Tender
Deans have done it since but yours is the ORIGINAL. Can't remember seeing an ad for it either.
Best regards, thanks for a real blast from the past, Ian.