Officially designated as the Porsche 356 B Hardtop, the Notchback Coupe was another two-door fixed-roof variant of the 356 B T5. Introduced in 1961 and built by Karmann (the same company that built the VW Karmann Ghia and Convertible VW Beetle), the T5 Notchback coupe was produced only during 1961 for a limited run of a little over 1,000 cars. It is rumored that the Notchback appeared because Porsche found many customers in Europe that bought a Cabriolet with a hardtop and no soft-top, thus assuming there was a market for a fixed hard-top variant of the 356 Cabriolet. Thus, they designed the Notchback as a Cabriolet body with a Hardtop welded in place, with no window frames, and unique interior finishes around the doors as well as special carpeting. At the end of 1961, the T5 Notchback evolved into the Porsche 356 B T6 Notchback.