Well the first note is signed by soldiers. I forgot what these were called. But they would all sign bills for each other. I have one just like yours.
yea the short snorter is best, heres some info on them.. 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". The tradition is believed to have been started in August 1925 in Alaska, United States. Jack Ashcroft and other Bush pilots started the tradition, which resulted in spreading through the United States military. When the short snorter was signed, the collector would have to produce it upon request, if not, they are bound to give the signer a drink.