8p Red Uncoated Paper C/B

1979 SG X879a 8p Red Centre Band Uncoated paper. Slight gum imperfections at top left. This is a very rare Machin item. Originally sold by a London Dealer, thinking it was the more common 2 band version, even dealers make mistakes! although on non chalky paper, these are printed on thicker that usual paper, almost like card, presumably an end of roll, as the print is very course. Cat £900