Air America Club coupon book cover with serial number 18501A, not filled in with member name. Accompanied by four used chits, same serial number, for 5, 10, 25 and 50 cents. (To tell you how far these chits would go at that time, a carton of cigarettes was $1 and a fifth of bourbon was about $2). Chits have been punched as used, booklet cover is excellent. Al Air America memorabilia are incredibly rare and difficult to find.