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					Originally Posted by M ELEY
					
				 
				 I still am fascinated with these types and hope to obtain an earlier specimen some day. Think 'XVIII' type, which from what I can glean from this thread so far would lack the later rachet and be more of a friction type. 
			
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 There were a number of co-existing typologies, the ratcheting locker being just one of them. By the XVIII century locking navajas were indisputably in common usage. Many had a lock but no ratchet, or a rotating ferrule, like modern Opinels, a good many only had back springs like modern slip joint and probably far more were simple primitive friction folders.
Cheers
Chris