This Commemorative Stamp Cover depicts 'The Terror of the Zygons', a classic 4 part story that found Nessie on the loose and was first broadcast during Aug/Sept in 1975.
Signed by the Brigadier, the late Nicholas Courtney.
The Terror of the Zygons Commemorative Stamp Cover - Scificollector -Creators of the Merlin & Torchwood Action Figures & Exclusive Doctor Who Merchandise