Lot 339
Trial: 1959 3d deep violet, "Dollis Hill phosphor trial" (SG 575var/Spec ST7(3)a) 2mm blue phosphor centre band, printed...

Auction: 14 September 2022 at 01:00 BST
£50
Estimate: £60 - £70
Description
Trial: 1959 3d deep violet, "Dollis Hill phosphor trial" (SG 575var/Spec ST7(3)a) 2mm blue phosphor centre band, printed over the ink, and a second band in centre of margin, perforated on gummed Crowns (upright) watermarked paper, fine u/m

