Lot 30223 – 1974 Bradbury Wilkinson “all over phosphor” trials

1974 Bradbury Wilkinson “all over phosphor” trials for the British Post Office on Lundy Puffin stamps, with three part sheets of 70+, one in red with 4p and 5p printed in top of each other, one with 4, 4 1/2, 5 and 5 1/2 printed on top of each other in different colours with ms “7 passes” at top left, and 5p in rose with ms “2 passes” at top left, all three with the printer’s inscription at footNote: See footnote in Jon Aitchison’s “Stamps and Postal History of Lundy Island” p.104