GRENADA 1970 15C PIRATES THERMOGRAPHED COLOUR TRIAL
15c Pirates composite colour trial, on chalk-surfaced, gummed paper measuring circa 49 x 60 mm, combining typographed background with thermographed figure. Ex Bradbury Wilkinson. Scarce survivor. Generally fresh and fine. SG367var; SC345var
Note: Bradbury Wilkinson experimented with thermography in an attempt to cut escalating engraving costs, but the trial was short-lived as the depth of shading offered wasn't deemed acceptable
