Miquelet locks are a type of flintlock often found on pieces originating in the Eastern Mediterranean and North Africa.  They have exterior mainsprings that usually bear directly on the cock, and various forms of frizzen spring.  The springs are quite stout with short travel, and create a fast ignition.  This pistol lock had broken frizzen and main springs.  Replacements were made of 1075 steel, carefully reduced in strength so the tired screws on the lock would not self-destruct.  The mainspring is held to the lockplate with a tapered key, and friction holds the smaller spring above.