Replacing Your Clock
In recent years, mechanical movements used to repair or replace traditional Simplex clocks have become obsolete. We still offer some clocks with mechanical movements, such as impulse clocks, but in most cases we recommend upgrading to current clock technology. Simplex built several different types of clocks. To find out which kind you have, look for the original model number on the back of the clock. It’s typically eight digits separated by a dash. For most Simplex clocks, the first four digits just determines the case material; plastic (6310) or steel (2310).
Compatibility
For eight-digit models, the two digits after the dash are most important when finding your replacement clock because they denote the movement type:
–9000 Series: Impulse
–9100 Series: Electronic Frequency
–9200 Series: 3-Wire Synchronous
–9300 Series: Stand-Alone Electric
–9400 Series: Stand-Alone Battery
The third digit after the dash describes the size, shape and mounting. The remaining digit(s) will vary by system type.
