I have an original top grade Whitworth Target Rifle lock made by the very best lock manufacturer Joseph Brazier in my collection.
Joseph Brazier Ltd have photographs of this particular lock in their archive which is in the USA.
The rifle which this lock fits sells at a retail price of £15,000-00 what is the lock worth as I have a somebody trying to purchase it off me and I don't have a clue as to the value of it.
A few photographs of the lock are at:
http://www.flickr.com/photos/fronteria/page5/