Airmail Covers

Quality: ✉

1937 N° 164 “2fr. on 1.50fr. ‘Stanley’ and 176 ‘1fr. pink’”, indigenous scenes on an envelope for an international postal money order sent from Libenge on 23 April 1937 to Brussels; as the item was postage-free, only the airmail rate was paid, i.e., “2fr.” (rate effective 1 April: “3fr.” per 5gr.), rare item, very fine/fine