Thanks mate. I have read a few of those threads but it has done my head in. My interest really is in the 60s-70s models and decoding these is of greatest interest to me. Thanks for the model on the number. I have seen it at a bone yard and there's not much left of it but I'd kick myself if I let it pass and found out it was a series 1 or 2. It's a shame they didn't just give a year prefix and a sequential build number.