1964 HIGH VALUE PACKET SERVICE/£1 CASTLE ISSUE. Linen parcel tag (very minor creasing) sent registered mail with red "HVP" label and 9d Wilding and £1 Castle from London to "BANK OF SCOTLAND...EDINBURGH" cancelled "REGISTERED" oval datestamp with "BANK OF SCOTLAND" receivers datestamp 22.APR.1964. Very scarce commercial usage of the £1 Castle. (Ref 77666).
