Opel

Opel is a German manufacturer, named after Adam Opel, which started in 1862 from a sewing-machine and bicycle background. 

Opel (1934-1936)
Size: 135mm x 28mm

The "blue eye" badge was used in the 1900's until the 1930's. 

Opel (plastic)
Size: 75mm x 75mm

The "ring" bicycle tyre and stylised Zepplin (which morphed into an aircraft) was used in the 1930's until the 1980's.

Opel (1951)
Size: 180mm x 95mm

The "Z" lightening bolt was used since the 1980's.