Following Portuguese Army adoption in 1908, the Portuguese Navy adopted the Luger in 1909 as the m/910. The pattern they chose was a “new model” Luger in 9x19mm, with a 100mm / 4” barrel. A total of 650 were ordered in late 1909 and delivered between 1910 and 1912. The guns had Portuguese-language safety and extractor markings (“Seguranca” and “Carregada”) and included grip safeties. They were in a dedicated serial number range of 1 to 650. The first 350 were delivered under the reign of Portuguese King Manuel II and had crown-over-anchor chamber crests. With the establishment of a Republic in Portugal, that marking was changed to “R.P.” over an anchor, which was used on the remaining gun (351-650).

In the mid 1930s, the Navy ordered another 156 m/910 Luger pistols, this time from the Mauser company. These had the same Portuguese markings, but without any special crest - just blank chambers. They were numbered in Mauser’s export/commercial serial number range, and are in the “v” block of numbers. A few more very small orders were placed in 1941 and 1942, but these were filled with basically straight German P08 pistols.