South Africa 1981 State Theatre MS Imperf, Two Colours Omitted

1981 State Theatre miniature sheet TOTALLY IMPERFORATE, TWO COLOURS (BROWN & GOLD) OMITTED (SG MS492var/SACC 496a). Superb UM example. A premier showpiece of RSA philately with only 3 sound examples recorded. Photo-cert: Eichele BPB:"An exceedingly rare error with only three known.". (cvR140000). See additional images, with normal for comparison and of certificate below.