DaveG wrote:Not a chance, as far as I can tell, we don't have any documentation for the system at all.
If my predecessor was contactable, we may have been able to find the locksmith that created it, but he isn't, we have no records in the office, and nobody knows much about it.
We have the physical keys, and the physical cylinders, but that is it really. As mentioned earlier, most of the change keys are originals, and thus have code numbers stamped on them. Everyone who has a master however, appears to have a copy. As nobody has ever lost (or admits to losing) a master, the original master (with the relevant codes etc) is either in the directors house, or never left the lockie.
There is no key-control whatsoever with this system, in fact there is nothing that would give even the most eagle eyed key-cutter a hint that the keys are part of a master key system. On my first day at work I had to take the cleaner's master and get myself a copy from Timpsons in the local ASDA. He didn't bat an eyelid.
If it's an ISEO " factory "system then it was probably keyed up by M. Marcus or supplied by Duffells. Contact either with the system number. Extending a system without knowing the original design is a nightmare.