1964 UNDERPAID MAIL USA TO LETCHWORTH HERTS. Envelope (241 x 105), slight creasing, from the USA to Letchworth Herts England with US 5 cent deep blue embossed cancelled TEANECK/N.J. OCT 16 1964, postage underpaid with "6½D/MORE TO PAY INSUFFICIENTLY PREPAID" charge mark and 6d postage due cancelled REGISTERED/LETCHWORTH HERTS date stamp. (Ref 111501).
