18th Janury 1968 4d PVA Gum Deep Olive-Brown machin U11. Listed in Gibbons Specialised Catalogue as First Day being 22nd Jan 1968, making this cover 4 day pre-release. The cover was serviced by P.R O'Connell a well known dealer at the time, and in the know. The cover has a Western Central District Office WC1 cds. This 4d machin is NOT listed in any First Day Cover Catalogue.

Pristine condition, unsealed, blank insert card, label address.