Opel - 1924 - Assembly-line production of the 4/16 hp Opel, 1926.

Assembly-line production of the 4/16 hp Opel, 1926.

Opel - 1924 - A procession comprising the daily production quota of 125 “Tree Frogs” on the Opel Racetrack, 1924

A procession comprising the daily production quota of 125 “Tree Frogs” on the Opel Racetrack, 1924.

Opel - 1924 - The 4/12 hp Opel “Laubfrosch” (Tree Frog), 1924

The 4/12 hp Opel “Laubfrosch” (Tree Frog), 1924.

Opel - 1924 - The 4/12 hp Opel “Laubfrosch” (Tree Frog), 1924

The 4/12 hp Opel “Laubfrosch” (Tree Frog), 1924.

Opel - 1924 - Advertisement for Opel customer service, 1929.

Advertisement for Opel customer service, 1929.