Auction UPA 97

KGV: Rarely does one encounter perfection in an indisputable confirming Control R21 corner marginal control strip of THREE in unmounted mint full original gum never hinged condition of the RARE 2½d. Royal Cypher (Simple) DULL PRUSSIAN BLUE shade. SG Kings Specialised confirms The R21 control is all that is needed to confirm the DULL PRUSSIAN BLUE shade, however the strip is accompanied by 5th October 2022 RPSL Photo-Certificate confirming attribution (but mentioning disturbed gum from removal of hinges) … which is purely the edge of the gum wash in the marginal selvedge for this rare piece has never been hinged. Though gratuitous nice to have a second opinion. 'London' Retail £3,950= Major KGV RARITY (1. R21 Control Strip of Three) Current 'London' Retail £3,950= Cat £4500 (image available) {UM} (Start Price / Minimum Bid = £2,636.00)