Gary Stephenson wroteA combined lock and boltwork unit, may be Bates, but not a very clear name stamping.
Gary that unit looks similar to the Worrall systems that Midland Banks used on their main entrance doors many years ago, the Worrall’s we saw always had rack and pinion drive though, and not a follower cam like your one. They were a pain as they were half embedded in the doors and often clad with bronze or stainless. Yours is clearly a different type though.
Your stuff just keeps getting better….love that Chatwood detachable bit, never seen one even remotely like that!
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