SS (Swallow Coachbuilding Co. Ltd.), was founded by William Lyons and William Walmsley and began by manufacturing streamlined bodies for sidecars.  After this, the company built special coachwork bodies for existing cars, such as Austin, before in 1931 the first SS appeared, the SS 1, which had a Standard engine.  Successes for their sports cars followed, with the Jaguar name being introduced in 1934 by William Lyons.  In 1945 the company became Jaguar Cars Ltd., with the Swallow tradename being sold.

1927 SS Austin Swallow Saloon. Model by Milestone Miniatures
1935 SS Jaguar 2.5 Saloon. Model by Oxford Diecast
1935 SS Jaguar Airline. Models by Milestone Miniatures & Altaya
1936 SS Jaguar 1.5 Saloon. Model by Franklin Mint
1938 SS Jaguar 100. Model by Solido
1938 SS Jaguar 100 Coupe. Model by Spark