Turks and Caicos SG143h 1917 1d red WAR TAX R/H stamp ERROR OPT DOUBLE at TOP

1917 (Oct) 1d red type 40 WAR TAX opt in black second printing horizontal pair the right stamp ERROR OPT DOUBLE (at top) large part o.g. Minor gum creasing but fine appearance. Rare in this se-tenant form. (cat 275). Purchased from Stanley Gibbons (still on their card)