Wood Movement Seconds Clock. Between 1815 and 1835 or so brass was very expensive and 30-hour table clocks were the coin of the realm; houses were purchased for clocks, etc.. Made with all wood gears (except for the escape wheel, which gives the tick-tock sound), they had to be wound every day. This is an absolutely unique one-off built by a retired NASA engineer. In addition to be 1.5x larger than typical wood movements, it has been designed to 1) beat seconds (one tick per second) and 2) run for eight days. This is a very desirable clock for clock collectors.