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My son does watch and clock repair on a full time basis. Hallicras Works A few years ago, someone gave him two Greiner watch timing devices. I have a background in electronics, but my skills in vacuum tube circuits is a bit rusty. Finally found some time, motivation, friend to try to get them to work. After some minor cleanup, they look to be in good condition. No obviously failed electronic components. They must have been expensive machines when new. They are really well engineered and constructed. Motormikrophon ML61 . We have no manuals, or schematic diagrams for this one. I've sent requests to Greiner in Switzerland, as well as a Greiner rep in UK, and they don't have any documentation. I've connected the small coax audio cable from the MotorMikrophon to a Guitar amp, and a PC, and the microphone is working fine. I can manually press down on the sequencing relays and get the motor to rotate the watch holder / microphone. It will not cycle the rotation by itself, regardless of the various switch positions we've tried. Not sure if it needs a DIN connector on the back to make it operate. I thought it might be some Resistive/Capacitor charging circuit that might reach a threshold voltage and trip a relay to start a rotation sequence. But so far, no luck. Chronografic Super. We found a schematic diagram for this one, but no operation manual. The electronics sing a bit in the various switch positions for different crystal controlled Beat per Hour settings. The synchronous motor feels like it has a bit of a pull, but will not start to rotate on it's own, or with a nudge. Not sure if the leaver is used to kick it into operation. With some 'noise' on the microphone input, we can sort of get some hammer pounding noise to mark the paper with dots. It would be nice to get them working again. If the Chronografic can't work, I was thinking of connecting the MotorMikrophon to a PC and make some kind of a PC based software to enable watch timing. So, my First ask is for some operating or service manuals of any type or language, or any first hand knowledge of how to get them working. Thanks folks.