1976 UNDERPAID MAIL USED IN JERSEY. Post card to St. Helier with 4½p Jersey definitive (SG49a) and Guernsey ½p, latter unaccepted for postage with boxed instructional 'STAMP INVALID'. The former cancelled JERSEY date stamp 28 JY 76 and on front boxed '1P/TO PAY UNDERPAID' charge mark with Jersey 1p postage due cancelled 29 JY 76. (Ref 77727).
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