Canceled at Moscice, transported on Balloon Moscice during the 11th Regional Free Balloon Competition for the cup named for Col. A. Wankowicz, postmarked June 28 on landing at Zagorz, then by surface express to Inowroclaw with June 30 backcancel.  Also, a COD, registered, express cover from Bobrowa to Warsaw (Warszawa).   A portion of a red, triangular, collect-on-delivery ("Remboursement")label remains.