Is it a car?
Is it a boat?
Nope. This is an Amphicar.
An amazing vehicle was produced in America between 1960 and 1963, but assembled from stockpiled parts until 1968. In total 3,878 car/boats were built, 99 of them converted to right-hand drive.
Notoriously, the vehicle wasn't really very good on the road or water, but the film I've seen of them looks OK, if a little slow. No matter, a serious classic, if you find one in any condition it's going to be worth a pile of cash. And yes, I'd love one.
The only model I know of was scratch built by a guy at our boat club and really looks the part. I've often wondered why we've never seen a kit of an Amphicar, surely it would sell? Even a 1/32 plastic model would be a bit of fun.
This example is in the Manx motor museum and looks both roadworthy and seaworthy, although I thing "river" or "still pond" worthy would be more appropriate as I wouldn't want to get out on a choppy ocean in one.