The plugs and sockets are not the same as the previous version (packing item no. 7130) can be combined. Sleeves fit, with restrictions, into sockets of previous versions of control and control panels. The control devices and decoders in the Märklin program have been converted to the new standard. These plugs and sockets cannot be used with the earlier versions (package, item no. 7130). The sockets will fit as plugs with some limitations into the sockets on the older versions of control boxes. The control components and decoders in the current Märklin program have been changed to the new standard for plugs and sockets. If you have any questions, we are happy to help you. You can reach us either by email or fax and by telephone on weekdays between 10 a.m. and 7 p.m. If necessary, we will al.