Drawback Lock

This 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.