On 16 December 1914, the Commonwealth forces occupying the German Marshall Islands issued their first overprinted stamps. The stamps are Marshall-Inseln MiNr. 13-25 overprinted "G.R.I." (abbreviation of Georgius Rex Imperator) with new values in Shillings and Pence.
The overprints can be found in several typesettings, but Michel lists two major types, Type I and Type II.
Line spacing of the first typesetting (Type I, catalog suffix "I") is 5 mm (MiNr. 1-9) or 3.5-4 mm (MiNr. 10-13). Line spacing of the second typesetting (Type II, catalog suffix "II") is 6 mm (MiNr. 1-9) or 5.5 mm (MiNr. 10-13).