If I had to guess, I would say that there were more 1000 and L1000 mechanical digital locks sold then any other kind from their introduction by ILCO until late in the 20th Century. Even today, they are still a popular lock and few locksmiths have not encountered them at one time or the other.

One of the most common service problems that I have found regarding these locks is a lost combination. This video takes the mystery out of finding a lost combination for these locks, shows some bypass methods and how to reset a combination to put a 1000 or L1000 back into service.

Don’t let a lost combination prevent you from servicing the Simplex 1000 or L1000 — download this video to your computer now for only $9.99