Chief: I have read that for sheer numbers, the Anson & Deeley boxlock design is the single most-copied human invention on the face of this planet. That SKB would use one as a basis for their SxS makes perfect sense. As far as patents go, 1875 was a long time ago now and any protections that might have existed have long-since expired. Comparing a handmade gun to a machine-made gun is akin to beating a dead horse anymore. Comparing their utility and dollar-cost value might bear further consideration.