If you think a collection of articles on clocks might be of interest or use to you, and want to find out more, feel free to visit www.clocktips.com .
I don't sell them, the site is just a collection of articles on dishes, channels, technology etc. (as you may have guessed from the site's name ;> ) that I've collated, all used with permission. (You can click on the Articles1, 2, 3 & 4 links on the top right for a list of more.)

Here is a link that might be useful: Clock Tips