Finding information about history of using pin

Hi to all

I´m writing about the history of using pin from a club, congress, etc.
Its very common to use or to create a pin for special event or to a club.
Can You help me to maybe some information about is someone remember what is the first pin for bonsai subject.

Do you think is usefull a web site or maybe this forum to bring informations about pin.

This pin is a example I try to explain.

Think Bonsai Pins and Think Bill Valavanis Definitely King Pin

Yes its true. And the Queen is Solita Rosade

Best regards