Mariusgmioc,
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Originally Posted by mariusgmioc
We can speculate ad nausea about the primary role of the "carraca" mechanism but technically there is a clear reason for it: SAFETY. More exactly to ensure a controlled closure of the blade all the way.
While for a small or "normal" size pocket knife controlling the closure of the blade is not a problem, for a 30 cm (12") blade (quite common size for the fighting navajas) the accidental closure from an incomplete opened position can be disatrous for the owner's fingers. Hence, the necessity to provide the knife with additional safety.
All this said, there might also be the dramatic (whether intimidating, warning or simply flashy) effect of the "carraca" sound when opening the navaja.
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You may well be right, but the French lockable clasp knives did not have them, except those made specifically for the Spanish market, es exemplified by Giordias.
In fact most large French `navajas' exported to Spain in the 19th century did not even have a positive lock, sporting only a robust variation of what we call the slipjoint and which I call a demi-lock.
Also Italians had ratchets on their variations of the large `navaja' but by the late 19th century the `teat' lock took over and the ratchet disappeared.
So what are we to make out off all this? Did safety suddenly become superfluous? And why did some old Spanish navajas have 15 teeth and others only three?
And here's something else to consider: With the old piclock and the later ring lock, the fingers were not threatened when intentionally closing the clasp knife. This danger only materialized with the introduction of the lever release on Spanish knives at the end of the 19th century.
Cheers
Chris