American Motorcycle Association pin date?

[67GTA]

Found this pin at an old 1800's house site that disappeared in the 30's-40's. I've pulled a lot of jewelry out of this site, but very few coins. I think it is a later pin because of the letter arrangement. Most of the early examples I can find have the M at the top of the pin. It had the safety pin type attachment on the back. Can anybody "pin" a date on it?

 

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[angelito1]

back pic needed to see if chain with motorcycle was attached at some point

 

[67GTA]

Just looks like the standard safety pin type to me. Don't see any other attach points.

 

[smallfoot]

1930s according to :https://www.flyingtigerantiques.com...ssociation-ama-1st-year-member-lapel-pin.html

 

[trdking]

yup definitely 50's AMA