Vintage Tin Wind Up Tin Toy Cars

I've had these three wind up cars since I was a boy on the 60's. I've looked at numerous websites and image search engines and have not been able to find any information about them. I was hoping that someone here might be able identify them.

They all day Made in Japan on their bumper/backs. The VW Bug measures about 2 1/2" long, and the other tyr two just over 2". They all work perfectly well. In fact just for fun, I wound then up, set them side by side and made a video of the race (bulldozers are sneaky fast).

Thanks for your help.

Regards

bunionboy