Great Britain 1964 1s Mint Strip of Three Watermark Sideways-Inverted SG D64Wi

Great Britain 1964 Scarce 1/- Ochre Postage Due Mint (Sweated Gum) Vertical Strip of Three Variety Watermark Sideways-Inverted. C/w FU Single Normal Sideways Wmk to Compare. SG D64Wi Cat £225 as Three Mint or Used Singles.