thumb|Prototype in SAAB museum Trollhättan
The Saab Catherina is a 1964 prototype automobile, commissioned by the Swedish automaker Saab, designed by Sixten Sason and made at the workshops of the Aktiebolaget Svenska Järnvägsverkstäderna (ASJ - the Swedish Railroad Works) in Katrineholm, Sweden (hence the name). It is a red, two-seat sports car with a targa top.
thumb|Rear view
Sason, who was working as a freelancer for Saab, made some drawings of a small sports coupé in the early 1960s. As Saab was planning to introduce a sports car model, the company commissioned him to adopt the design for mass production.