This is a 1923 Claraphone banjo that i bought on ebay.There wasnt a whole lot there,just the neck and drum, plus a few of the metal bits and pieces, and only three of the tuners with a finish that only 90 years could apply. The total length is about 21 inches and the drum is about 6 inches in diameter. I made the clock out of scraps of black walnut veneer and super glue, lots of super glue. It has an hour hand, a minute hand and a seconds hand, it shows am/pm and days of the week. The clock is powered with a battery feeding an electromagnet that is turned on and off by a sliding brass switch. Instead of a regular pendulum, it has a pendulum wheel that has a permanent magnet mounted to it that reacts with the electromagnet making the pendulum wheel rotate back and forth, thus driving the clock. You can build a wooden gear clock any way you want, it helps to think outside the box, or in this case inside a 6 inch wooden cylinder.The gear train is pretty much standard, there are a few changes that i will explain later. If you want to know more about the math of a wooden gear clock this site http://garysclocks.sawdustcorner.com
will explain things in detail, you will find a wealth of information. If you want to build your own clock this site http://lisaboyer.com
is one of several sites that has plans along with other stuff. This is how I built this one.