Category: NEW GUINEA - 'N.W./PACIFIC/ISLANDS' Overprints - Official Mail
1919 OHMS cover with Treasury cachet at L/L, to GB with rare franking of Fifth Setting 4d orange punctured 'OS' SG O4 tied by 'RABAUL/19MY19' cds, black/white registration label, Sydney transit & London arrival b/s, minor blemishes. A very rare First Day Cover: 19.5.1919 is recognised by Gibbons as the earliest date of use for any of the 'OS' punctures.
[There is a footnote in Gibbons that states a 1d 'OS' has been seen dated 2AP19. We question why that doesn't appear in brackets with the listing for SG O3]
Official mail , AUSTRALIA , New Guinea , Postal History , NEW GUINEA "N.W./PACIFIC/ISLANDS" Overprints , overprinted stamps , Military World War I , Registered Mail & Registration Labels , GREAT BRITAIN , C of A KGV King George V Issues , First Day Covers