1926–1940[]
Print version 
Red version
Alternate version
Alternate version #2 
1940–1968[]
Boxed version
Yellow boxed version
1952–present[]
1952–1968[]
Print version 
Alternate version
1957–1971[]
Alternate version
1971–2009[]
Sign
Stacked version
Wordmark
2009 (prototypes)[]
Agipgas[]
1985–2009[]
Horizontal version