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It's a neat electronic mechanism. If I have worked this out right, the transistor is on when power is applied, and makes an electromagnet of one of the concentric coils; that pulls the pendulum across, which produces a back EMF in the other coil that opposes the transistor bias and turns it off, then the pendulum swings back. There is an adjusting system hidden by a label, ISTR. Mine didn't want to go, and appeared to have an open circuit on one of the coils. You need micro-surgery skills to repair that, but if it's past mending, it's possible to piggy-back a quartz movement to drive the hands once you've removed the electronics stuff. You will also have a more accurate clock if you do! I did get another running with a squirt of WD40 which seemed to loosen up the old lubricant. There are as many out there who oppose WD40 as believe in it, and I hesitate to even suggest it, but it has its uses. Just today I got a nice pocket-friendly measuring tape retracting properly with some of it. I've been cursing the tape for years and hadn't thought to try a bit of lubricant. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org