“The Caterpillar Club is an informal association of people who have successfully used a parachute to bail out of a disabled aircraft. After authentication by the parachute maker, applicants receive a membership certificate and a distinctive lapel pin. The nationality of the person whose life was saved by parachute and ownership of the aircraft are not factors in determining qualification for membership; anybody whose life was saved by using a parachute after bailing out of a disabled aircraft is eligible. The requirement that the aircraft is disabled naturally excludes parachuting enthusiasts in the normal course of a recreational jump, or those involved in military training jumps.“
Brought back memories of my dad's "induction" into the Caterpillar Club in 1962. When we cleaned out and sold my folks' house, I took a picture of his framed membership certificate; he often wore the lapel pin on civilian sport-coat lapels.
https://en.wikipedia.org/wiki/Caterpillar_Club