Yes, the old style top lever linkage consists of 4 separate parts. The lever and the bolt are at opposite ends of the chain and there are two pieces of linkage in-between. If the bottom of the bolt gets damaged, nothing else can be moved.
The later style (post 1910) linkage is a direct connection between lever and bolt this eliminating everything in-between.
The top lever is a hardened part. It would take a good amount of wear and force to break the bottom of it off.
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B. Dudley
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