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<p>[QUOTE=&quot;Ce BCA, post: 4176075, member: 18716&quot;]Perfect, thank you.&nbsp; It lists the catalogue as 1902, so just into the 20th, but presumably it could be a bit earlier.&nbsp; It also gives the patent application of 1921.&nbsp; The pic with date suggesting 1840&#039;s has no reference, and is next to the bolt ring which also says 1840&#039;s - I would suggest it is possible they may have made an error on the 1840 title for the pic?&nbsp; I can&#039;t find anything to back up such an early date for a spring ring elsewhere.&nbsp; I do note it looks different with a tiny pip for the catch so there may be something in it, I might ask if they have references for it.[/QUOTE]</p><p><br /></p>

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