United Kingdom 

Introduced in 1922 the Austin Seven not only saved the Austin company from going out of business, but also revolutionized British motoring.  Its diminutive size made it unique and by 1927 approximately 20,000 were produced each year, continuing  through the late 1930s.  The Austin was built under license all around the world including France, Germany, Japan and the U.S.A.

As production increased and the price decreased other manufacturers had a difficult time competing.