Lot 50478 – 1938-54 1s Black & Brown mint block of 8 showing BOTH “Mountain Retouch” varieties

1938-54 1s Black & Brown mint block of 8 showing BOTH “Mountain Retouch” varieties (R6/7 and R5/10) plus “Sky Retouch” (R6/9, below value), positional plate marking in selvedge which has some faint gum translucency (and slightly on the variety), very rare positional multiple, a great exhibition item for the specialist (SG £6’038+)