Thanks for the welcome Pete. I have not yet figured out if the lock up is a Pieper patent but to be honest, I haven't researched it a great deal. There is a contributor to the littlegun website who has written a history of the Pieper companies but as it is only in French I have not bought it yet. Need to work on my translating abilities. I am also aware of the "Henri Pieper" damascus gun and have seen a photo of it but do not remember where on the web I found it. Quite unbelieveable! If I find it again I'll try to get a link to it or post it here.
I'll get some photos of my other guns up in the next few days. Thanks for the link on posting photos.