American First Day Cover Society Devoted to the advancement of First Day Cover collecting 95th Fund Raising Auction Index | Previous | Next 121 Lot # Scott # Date Description Est. Value Miscellaneous 1920s 121 C4 - C6 8/15/1923 Radiator & Propeller; Uncacheted; Airmail Set of 3 - C4, C5 & C6, serviced by Pioneer Edward C. Worden. A matching set in pristine condition $1,750.00 Index | Previous | Next