United States Airmail & B-O-B Collection, 1862-1997. On Scott Specialty pages, lacking C13-15, otherwise mostly mint (C3 is used) including C18 n.h., Special Deliveries complete mixed condition, scattered Dues, Parcel Post & Dues mostly used, Ducks complete to 1997 mostly mint, earlies mint but mixed condition, quite useful Revenues 1st Issue perf to $3, and other scattered; close evaluation recommended. Estimate  $2,500 - 3,500. $0