Noun
English Wikipedia has an article on:notchbackWikipedia
notchback (plural notchbacks)
A motor car whose rear window makes an angle with its back segment
Both years of these unique cars have taken the name "Karmann notchback". citation 356 C infobox The last revision of the 356 was the 356 C introduced for the 1964 model year. Source: Internet
A unique " Karmann hardtop" or "notchback" 356 B model was produced in 1961 and 1962. Source: Internet