Dating tips? (For old locks)

[BBE]

Church Ward and bridge wards are the same thing.

Bridge warding was far more expensive than just knocking a pin through the side of the case, so were only available to the rich and powerful, which became synonymous with churches. Many people call these big iron keys "Church keys" to this day around here. (English countryside near Wales)

Thanks Nigel. You can understand my curiosity when you realize that in the US this is usually referred to as a church key.
BBE.