1967 UNDERPAID MAIL US TO TONBRIDGE KENT. Envelope US to Tonbridge Kent with US 5c x 2 cancelled CEDAR RAPIDS MAY 21 1967, postage underpaid with UK "4D/MORE TO PAY INSUFFICIENTLY PREPAID" charge mark with 4d postage due cancelled STAPLEHURST/TONBRIDGE KENT cds 13 JU 67. Also on front straight line "NOT IN AIR MAIL" hand stamp. (Ref 111287).
