Short snorter

A short snorter is a banknote inscribed by people traveling together on an aircraft. The tradition was started by Alaskan Bush flyers in the 1920s and spread through the military and commercial aviation. During World War II short snorters were signed by flight crews and conveyed good luck to soldiers crossing the Atlantic. Friends would take the local currency and sign each other's bills creating a "keepsake of your buddy's signatures".