New Guinea

With the outbreak of World War I, German New Guinea was occupied by Australian troops.

 File:New G 2s GRI.A.webp|2/- on 2 mark value File:NewG GRI reg label.A.webp|1915 3d Herbertshöhe surcharge File:New Guinea Marshalls GRI 1d wide.jpg|1914 1d on 3pf surcharge 
 * Beginning in October 1914, German New Guinea Yachts were surcharged G.R.I. and new values, in several settings and styles. Better values including errors have been forged. Genuine surcharges are slightly rough and grainy, forgeries are very sharply printed.
 * In 1915 two values were re-surcharged.
 * Also in 1915, registration labels from eight towns (plus slightly different styles of town names) were surcharged G.R.I. and new values for use as provisional stamps.
 * In 1914, German Marshall Islands Yachts were also surcharged similarly. The pence values have the two overprint lines 5mm apart, the shilling values with overprint lines 3½-4mm apart.
 * In 1915, two of the surcharges on Marshall Islands stamps were also re-surcharged.
 * Also in 1915, Marshall Islands Yachts were again surcharged, now with pence values having the overprint lines 6mm apart and the shilling values with overprint lines 5½mm apart. These were never used.

 File:New Guinea 1d village.jpg|1925 1d village File:New Guinea 3d village air.jpg|1931 3d airmail overprint File:New Guinea 1.5d bird dates.jpg|1931 Bird of Paradise with dates File:New Guinea 4d Birdofpar.jpg|1932 4d Bird of Paradise File:New Guinea BofPar air.jpg|1932 6d airmail 
 * In 1915, Australian definitives with OS perfin were used briefly.
 * Then, beginning later in 1915, along with Nauru, stamps of the North West Pacific Islands were used. In 1916, Nauru began issuing its own stamps. See: North West Pacific Islands
 * In 1921-25, New Guinea became a mandated territory and pictorials featuring a village of huts was issued. They were inscribed "TERRITORY OF NEW GUINEA". These were overprinted with a biplane and AIR MAIL for that service.
 * In 1931, a Bird of Paradise design was issued with "1921" and "1931" in date scrolls. These were also overprinted with a biplane and "AIR / MAIL" for that service.
 * In 1932, Bird of Paradise stamps were issued without date scrolls. Once again, they were also overprinted with a biplane and "AIR / MAIL" for that service.

 File:New Guinea jubilee.jpg|1935 1d Jubilee File:New Guinea coronation.jpg|1937 2d George VI coronation File:New Guinea 1.5d gold fields.jpg|1939 1½d plane over gold fields 
 * In 1935, an engraved monoplane over Bulolo gold fields design was issued in £2 and £5 values. These have been forged in engraving, but are overall sketchier than the genuine. The 1939 stamps can be used for comparison.
 * In 1935, 1d and 2d Bird of Paradise stamps were overprinted HIS MAJESTY'S / JUBILEE / 1910 –– 1935
 * In 1937, a small format George VI coronation set was issued.
 * In 1939, the monoplane over gold fields design was revived, now with "AIRMAIL POSTAGE" at bottom.
 * In 1942, regular postal service was suspended with the invasion of Japanese forces.
 * At war's end, Australian stamps were used until Papua New Guinea stamps were issued in 1952.

Official issues
 File:New Guinea 1d GRI offic.jpg|1915 1d on 5pf surcharge File:New Guinea 1.5d village offi.jpg|1925 1½d value File:New Guinea 2sh bofPar dates off.jpg|1931 2/- value (with dates) File:New Guinea official.jpg|1934 2½d value 
 * In 1915, 1d G.R.I. surcharges were issued with an additional O.S. above.
 * In 1925-31 village definitives were overprinted O S.
 * In 1931, Bird of Paradise stamps with date scrolls were overprinted O S in sans serif letters widely spaced.
 * In 1932-34, Bird of Paradise stamps without scrolls were similarly overprinted.

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