Lot 80872 – 1938-50 6d and 1s both showing variety “line on sail” but weaker than normal, possibly re-touched

1938-50 6d and 1s both showing variety “line on sail” but weaker than normal with it clearly showing on the rear sail but only as a couple of dots on the main sail, possibly re-touched(?), the 1s in mint nh top left corner marginal block of four in pos.R1/1 (and not listed by SG), and the 6d in mint lh single, very fine items for the specialist