Three items c. 1942. 3-5/8x6.5" mailer with serial #52299 sent from "Editorial Offices All American Comics, Inc." addressed to recipient in Lake Lillian, Minn. includes "Keep 'Em Flying!" rwb sticker. Trace of light wear as mailed. Rare and Fine. 2x2-3/8" fabric patch has text "All American Flying Club Hop Harrigan Says: "Keep 'Em Flying" with wings logo in center. Patch is Mint and scarce. 5-3/8x8-3/8" printed letter from "Headquarters c/o All-American Comic" includes text "Dear Friend: Here Is The Beautiful All-American Flying Club Label In Red, White And Blue Which We Wrote You About When We Sent You Your Membership Card In The All-American Flying Club, Recently. You Can Have Your Mother Or Older Sister Tack In On Your Sweater, Coat Or Jacket In Such A Way That It Can Be Put On Or Taken Off Each Garment Without Any Damage. This Label Can Be Worn Where You Would Ordinarily Have Put Your Pin Or Else You Can Have It Tacked On To Your Left Sleeve Where Members Of The Air Force Of The United States Army Wear Their Emblem! Meanwhile, Keep 'Em Flying! Hop Harrigan Pres. PS Don't Forget To Listen To My Radio Program, Monday To Friday On The Blue Network." Letter has two horizontal folds as mailed, otherwise Mint and unlisted in Hake's Price Guide To Pop Culture Memorabilia.