Saab Catherina

As Saab was planning to introduce a sports car model, the company commissioned him to adopt the design for mass production.

[2] For economy reasons, the Catherina utilised many components of the contemporary Saab 96 and shared the same wheelbase, which was longer than the finally accepted design.

[1][2] Stemming from the design of an integral 'roll bar', it was still a new concept in the automotive industry, preceding the 1966 Porsche 911 Targa, which popularized it (and established the name).

Sason also designed some other unusual features for the Catherina, such as the roof-mounted headlamps (for longer range), which were not included in the prototype because of the need to make the car fit for mass production.

[1][2] In each book and newspaper article since the 60's this prototype has been referred to as 'Catherina', but the document from ASJs archive where Sixten Sason suggested the name of the car, it states Catharina.