[4] The headstamp of the factory was "PA", though many variations such as "PAB", "PAF", "PAH", "PAM", and "PAR" also existed.

[5] After the unification of Moldavia and Wallachia, the need arose for creating modern centers of production and maintenance of weapons and ammunition.

[6] To accomplish this task, then-Minister of War General Ion Emanoil Florescu, sent artillery officer Henrich Herkt to Belgium on a mission to study the process of manufacturing ammunition.

[7] The same year, the new Minister of War, Prince Ion Ghica, presented a report on the need of establishing an ammunition factory to Domnitor Alexandru Ioan Cuza.

These included Decauville internal transport facilities, hot water installations, boilers, and steam engines.

The modernization process continued after the war, however, due to the shortage of skilled workers, Pirotehnia reached full operating capacity only in 1892.

[17] When Romania entered the war, the Pyrotechnics factories could produce 550,000 cartridges for the Model 1893 rifles, and load 1.8 million rounds.

Production continued but was significantly affected due to a lack of raw materials, qualified personnel, and some abandoned machinery in Bucharest.

[19] The Pyrotechnics continued the production of cartridges for both infantry rifles, artillery, anti-tank, and anti-aircraft guns.

[3][22] The former Pyrotechnics from Bucharest continued to work as a military enterprise until 1950,[clarification needed] when it was transformed into the "9 May" Plant.