1917 (21 Nov) OHBMS cover to WD & HO Wills, Sydney, from 'Collector of Customs, Gilbert & Ellice Islands Colony', oval 'OFFICIAL/POSTAGE/FREE' handstamp and 'GILBERT & ELLICE [ISLANDS]/GPO/OCEAN ISLD/NO 21/17/COLONY' cds, blue 'Protectorate' seal on reverse, minor blemishes