1969 UNDERPAID MAIL US TO SEVENOAKS. Envelope to Sevenoaks with US 10c and 6c cancelled LIBERAL, KS APR 3 1969 (Kansas), postage underpaid with UK "1/2D/TO PAY POSTED UNDERPAID" instructional and on front 2d and 1s dues cancelled SEVENOAKS/KENT 10 AP 69. (Ref 103156).
