large warder rim lock 14" x 9" was obviously made to
be fitted to a very substantial door. The key shoots the bolt
twice to lock. The handle fitted on the inside of the door draws
back the bolt without the need for the key. This is most unusual
and I can only assume that the intention of this feature was to
ensure that no-one would find themselves locked in the building.
Although this style of design was in use for many years the quality
of workmanship and key design suggests a manufacturing date of
between 1790 and 1810.