1981 / / VARIANT VN (= NEW VARIANT), the technical development of the VARIANT VS system is introduced. The hinges use maintenance-free slide bearing technology for heavy building doors.
1974 / / VARIANT VS (= HEAVY VARIANT), hinges for extremely heavy doors, primarily for the industrial sector, complete the range in a specialised field with increasing significance.
1968 / / K-hinges (= PVCu hinges) are offered on the market for the first time for the increasingly popular plastic windows and doors.
1963 / / VARIANT V (= Variable VARIANT), the first standardised hinge range from SIMONSWERK. It enables the mutual, variable application of sash and frame components as well as the application of rational iron fittings technology in industrial door and frame manufacturing.