Kitty Cat Snowmobiles

I just came across a vintage kitty cat cover in excellent condition. It is a pale green canvas with darker green piping, dark (almost black) inside and white kitty cat triangle logos at the front on either side.
Can anyone tell me how rare or not this is? Any idea what it might be worth? Am I correct in thinking it is from very early 70's.
Thanks.

The early black and pink are the rarest the one you have is also tuff to find sounds like a 80s BD