Looks like a genuine cooper s too! There's lots of fakes out there.
That car would have a 1275cc Austin A series engine, they might of modified it too a 1380 though, that's pretty common.
I have a Mini, it's a 1976 Mini S.
Looks like this except brown and with a fair bit of damage.
It was rolled and then left to sit under a tree for 10 years then given to me. I'm going to get a different shell for it and swap the suspension and engine over. It's got a whopping 998cc engine

doesn't run of course.
Thanks
Hayden