Its surprising how often I have found tumblers replaced on good English boxlocks,often poorly.
Not something you can really check for at a show either.
Makes one wonder why they went to the trouble of making a new one rather than welding up and reshaping the tip on the old one.
Also surprising how often one comes across restock jobs,that,while often well enough fitted used something that would have been more appropriate for a stock crate.

GDU