“The Italian tyre manufacturer was established in 1872. Without clear corporate guidelines on how to use the logo, it appeared in many variations according to what was popular at the time; the logos shown here represent only a small selection.”
Vintage Pirelli ad from 1922, via Pictorial Gems.
“The elongated P with its clever shift from thick to thin and back was a highly evocative way to portray the elasticity of Pirelli’s premium products.
“Although the number of variants diminished progressively after the 1930s stricter rules were sorely needed. In 1945, following WWII, a strong, clear sans-serif logo was created which has remained practically untouched until this day.”
More on the Pirelli website.
Pentagram’s Angus Hyland commented on the Pirelli logo in this archived post.
Pirelli signage photo (top) via F1Network.net.