I have a friend that was sponsored locally by Yamaha in 1974 (or '75 ?) on an OW12, (I think it was one of the first Yamahas with a monoshock) 250 works bike. They took it back at the end of the year and probably sent it back to Japan to be crushed. He is currently looking to buy an OW12, as a reminder of his his youth. If he manages to buy one , it will probably never get ridden, but where would he stand if he turned up to race it a vintage race meeting in Australia ?