Sorry, I forgot what the letters actually mean, but this 1911 is an Argentine military issue, made under license of Colt, and known as a "Colt Sistema".
DGFM-FMAP are letters standing for the manufacturer.
The Argentines adopted the Colt in the early 1920's.
Their first guns were 1911 models actually built here in the US by Colt.
As part of the deal, Colt quickly built a manufacturing plant in Argentina and built the guns there with US supplied machinery and under US control and management.
Later, they manufactured the 1911-A1 version also, but by this time the factory was under full Argentine control.
After the contracts expired, as is usual in South America, the factory and machinery became the property of the Argentines.
Years later, they began producing frames and slides for Springfield Armory, Inc who still assemble and finish them here.
The Argentine Colt's are usually considered to be about the equal of US government 1911 and 1911-A1 pistols as made in the US.