Hi Pete, I think its an early nod to a Bates Starcraft. Not a bad looking boat at all (a full sized Bates would get a few looks in NZ I'm sure,- NZ and Aust boats are quite different to Northern boats) I need to do a bit more to mine at some stage, - chine strakes, safety rails, lift up cabin top access flaps etc. I've added quite a bit to mine as it was very basic (and rotten) as received. My boat came from a farm rubbish bin so I have no idea when or where it was originally made, (very old either way)
Took me a few years to find out what it was, (eventually from memory from a vintage model boats company, -very helpful chap there).
Plan is apparently still available from Sarik Hobbies (X list plans -MM709) 13GBP) I actually thought of buying a plan and scaling it up to 40" and copying a Bates as there are lots of photos available to go off for detail. It would make a lovely model I think, if it came out like the pic.