Hi there

I am interested in antique French locks, especially those fitted to the Necessaire de Voyages.

I am particularly interested in why most French locks have the double-locking action. Naturally I would have said that because the locks themselves were relatively simple mechanically (many having only a few levers), a double-locking action would complicate the work of the lock picker, essentially making them have to pick the lock twice. Is there any truth to this?

I have seen standard circular and cloverleaf shaped drill pins on these boxes, does anyone have any information on other shapes that were used?

My thanks to anyone that maybe able to help