Production began on the premises of the present plant (H. Rafałowicz and S. Kronenblum).
By the current 1 Maja street , the production of castings started under the name of Iron Casting Factory and Enamelling Plant called ‘SŁOWIANIN’ (M. Hochberg and A. Ajzenberg).
‘SŁOWIANIN’ factory was transformed into a joint stock company with the capital of the Horzfeld-Victorius foundry from Grudziądz.
Horzfeld & Victorius foundry acquired all shares of the ‘SŁOWIANIN’ company which resulted in the establishment of the Cast Iron and Enamelled Castings Factory Horzfeld & Victorius Grudziądz- Końskie Plant.
The foundry operated under German management.
Herzfeld & Victorius Factory, the ‘Neptun’ Factory and S. Kronenblum’s foundry merged into a single state owned company by the name of KONECKIE ZAKŁADY ODLEWNICZE.
Machines for the centrifugal casting of sewer pipes in water-cooled molds were installed.
5 cupolas with a diameter of 900mm with heated blast were set up.
The first DISAMATIC 2011 molding machine in Poland was installed.
At the time KZO used to produce 103.5 thousand tons of castings. Employment amounted to 2,650 employees.
After the transformations of 1989, the plant regressed slowly, KZO would sell only 23 thousand tons of castings. Employment dropped to 1,400 employees.
The worn- out Disamatic 2011 was replaced with the Disamatic 2110 molding machine with an attachment for cores.
A powder paint shop (GWOMAL) for varnishing fittings without sockets was bought and set up.
The state-owned company KZO was transformed into a joint-stock company, in which the State Treasury became the owner of all shares.