Hey Ole,
I think you forgot to mention that it is a Modified Zwitter Split...
Yeah, that's right, forgot about this. I'm getting old...

When I purchased the car there was a square back window welded in, and a clip from an oval came with the car. So a coachbuilder welded the oval window "back" in the car. After the car was painted I figured out it originally was a Split...

Today I own a '52 Split, that's one reason why I want to sell the '53.
Best Regards,
Ole