On 17 October 1914, the Commonwealth forces occupying German New Guinea issued their first overprinted stamps. The stamps are German New Guinea MiNr. 7-19 overprinted "G.R.I." (abbreviation of Georgius Rex Imperator) with new values in Shillings and Pence.
The overprints can be found in approximately a dozen typesettings, but Michel lists two major types, Type I (17 October 1914) and Type II (16 December 1914).
Line spacing of the first typesetting (Type I, catalog suffix "I") is 6 mm (MiNr. 1-11) or 3.5-4 mm (MiNr. 12-15). Line spacing of the second typesetting (Type II, catalog suffix "II") is 5 mm (MiNr. 1-11) or 5.5 mm (MiNr. 12-15).