I have recently in work been given a sort of mini project I have been handed what must be about 60 years old or so world time clock, this is one of those arrangements where you have an arrangement of small clocks in a cabinet with each clock representing the time of a different city in the world. The problem is however a lot of the wiring has been butchered and I don't even know what power supply this ran off, the cable last found in it was a simple two core cable and i'd expect the voltage to be either 24v DC or 240 AC but I don't know for sure as of yet. The biggest problem is though whatever generated the pulse for all these clocks to run is not there, one the back of each of the clocks there is a small mechanism connected to a solenoid, when the coil is energized once it engages the mechanism and the minute arm moves half a minute, i.e. i need a pulse to be generated once every 30 seconds but i'm not sure how to do it. I could use a PLC I suppose but there are 1 amp fuses all over the show with wiring connected to the clocks and on the back of the fuses there are snippets of multicore cable in the terminals, i'm assuming whatever was connected to these generated a pulse. Any ideas?