Need to ask about a lot?

SOUTH AFRICA -COLS & REPS - RUSTENBURG 1900 1d rose-red and green with 'V.R.' HANDSTAMP INVERTED variety (SG 2var), mint part OG with missing perf at top. ONLY 3 KNOWN - 1 in the Royal Collection, 1 sold at the 1991 Liechtenstein Auction at Harmers, New York and another 'seen' by Tamsen (probably this example). 1994 BPA certificate.