1956 2D POSTAGE DUE BISECT ON COVER LONDON JUNE 1956. Envelope from Glasgow to London with 1½d Wilding cancelled GLASGOW 4 JNE 1956, postage underpaid due to an increase in the postage rate to 2d on 1st June 1956 with "1d" charge mark in green and upper half of a 2d postage due applied but uncancelled (other similar examples are recorded and have been seen by us). Usage accompanied by a similar envelope used same day Glasgow to Leith, also underpaid but with pair of ½d orange postage dues cancelled LEITH 7 JU 56. Unusual and rare matched pair of covers. (Ref 102376).