What Beetle do i have
 

Hi
I am trying to find out what model beetle I have.
Can anyone give advice on what things to look for to tell
the beetle apart (1200/1500 - 1300, 1301 etc?

I believe the engine was changed to a 1500 but am not sure if the actual car itself was orinally built as a 1500 or another model

any help is much appreciated