Its predecessor, the Weiss cannery, was originally established in Lövölde Square, District VI. of Budapest, by Manfréd Weiss and his brother Bertold in 1882, under the name of Weiss Berthold és Manfréd Első Magyar Conserv Gyár (Berthold and Manfred Weiss First Hungarian Cannery Factory). The brothers gradually expanded the canning factory, then moved it to Máriássy Street near the Közvágóhíd, where they produced meat products under the Globus brand, mainly for the army, and bridged the spare capacity of seasonal work by dismantling and reloading infantry ammunition. Later, in response to the growing demand for canned goods, the production of tin cans for packaging was added to the programme, which led to a shift to the iron industry. (Manfréd Weiss First Hungarian Cannery and Metalware Factory). From 1886 the factory also produced cartridge cases and later ammunition for the Austro-Hungarian Army and Navy. The new factory produced all types, from small arms to artillery shells.
In 1892 production begins at the infantry ammunition factory built within the Weiss Manfréd factory in Csepel, where 8 mm Mannlicher rifle cartridges are initially produced for the Hungarian Royal Defence Forces and the Austro-Hungarian Joint Army. From 1893, millions of 7.62×54 mmR-calibre Mosin-Nagant rifle cartridges were produced for the Russian Tsarist army between 1893-94. Then the production of artillery shells of various sizes begins.
Thus, Manfréd Weiss became one of the principal defence contractors for the Hungarian part of the empire, his main competitor being the state-owned steel mill in Diósgyőr, the Diósgyőr-Vasgyár. In 1906, the company was supported by Hungarian Society of Industrialists, who lobbied for a new law that would allow state-owned companies to produce only products unobtainable from private companies. With such support, the Manfréd Weiss Works soon emerged as the largest firm on the market.
Another boost in company's history came in 1911, when Austria-Hungary significantly expanded its military budget. The public orders allowed the company to quickly expand ammunition production and establish additional factories: new steel and iron furnaces, and new copper, nickel, and aluminium installations. Production capacity was growing and soon the firm became one of the principal sources of ammunition for the armies of the Kingdom of Serbia, Kingdom of Bulgaria, Portugal, Spain, Mexico, and the Russian Empire. By 1913, the Manfréd Weiss Works employed over 5000 workers.
During World War I, the workforce exceeded 30,000. For his services to the Austro-Hungarian state, Weiss was ennobled, becoming Manfréd, Baron Weiss de Csepel, after the main seat of operations of his company. In the beginning of the WW1, the WM complex had 250 hectare territory with 216 factory buildings.
By the outbreak of World War II, the company had become a modern industrial conglomerate, with over 40,000 employees; its management remained largely composed of Hungarian Jews. When Nazi Germany overran Hungary in 1944, the majority were arrested by the Gestapo. The Weiss family was allowed to emigrate to Portugal and escape the horrors of the Holocaust, but their large art collection, along with the entire industrial complex bearing their name, was taken over by Germany. However, as Germany insisted Hungary was still a sovereign nation, the owners of the company received large compensation and remained official owners, with the German-imposed management merely a trusteeship for a period of 25 years. Eventually, control over the company was given to the Nazi SS, with a completely new holding company's management, with officers including Erhard Milch, Kurt Baron von Schröder, and Hans Jüttner.[clarification needed]
From March 1944, the Weiss Manfréd factories were hit by numerous Allied bombing raids. The Danube Aircraft Factory was rendered inoperable by four such attacks. Seven raids on the Csepel factory resulted in severe damage to most of the metal works, the copper electrolysis plant was burnt down, while the aircraft, tractor and enamel factories were also destroyed.
The repair of the damage suffered during the Second World War and the resumption of production required a major effort. The factory not only had to meet domestic needs, but also produced machinery for war reparations and supplied the occupying Soviet Army with vehicle parts. In 1947, 90 percent of the factory's output was war reparations. The factory was placed under state control in 1946, at which time the Weiss-Chorin family's ownership was not yet extinguished, but in 1948 it was effectively nationalized.
Between 1948 and 1950, Ferenc Bíró (1904-2006), a younger brother of Mátyás Rákosi, was appointed general manager of the factory. During the years of forced industrialisation, the factory's production of machine tools increased, but when industrial policy changed in 1954, production declined. In the following decades, it grew again and diversified because of Comecon cooperation and significant exports to the West. By the 1970s, almost half of production was Western exports.
