Mk1 golf cabrio/saloon

Hi I wonder if you can help me out. I'm going to buy a mk1 golf convertible today. Only on the log book it says saloon. It's an early 1981 golf convertible. Could it be that due to the age it was regestered as a convertible. Looking in the Internet i cannot  find any info on the golf mk1 saloon. Any help would be great thanks.

Sorry if in the wrong section.