The first clock you work on should ideally be one of simple design and
relatively low value.
Avoid touching anything of sentimental value as
you may end up having to pay for the repair, and try to find one that does not
strike. If you must choose a striking clock, leave ones that strike on the
quarters alone. Wait until you have assembled an ordinary striking clock and
understand their workings thoroughly.
If you want to overhaul a clock of
sentimental value, practice on an old one first. These are plentiful in second
hand shops, but watch out for broken mainsprings as the impact of breaking can
damage teeth on wheels. Check that the clock will wind up fully, and if going to
an auction it pays to take a bunch of assorted winding keys or a star
key.
Pendulum clocks are easier for the amateur to work on than
hairspring models. Check that the movement is complete. Old American and German
clocks are good to start on, whilst French ones are very delicate. English
clocks are generally too expensive to practice on, except for the mass produced
models around in large quantities. Many of these are in 'Napoleon Hat' style
cases.
Repairing
Your Own Clocks by Mervyn Passmore