Jim, I haven't heard about the SBCo1 marking. I have an E grade with the LLH marking. Can you email me pictures of the markings, also showing the serial #? I would like to run something on it in the Lefever Collectors Association newsletter. Do the barrels have any letters stamped on or around the forend lug? Watch out for these Lefevers. They're addictive. It's just questions like yours that get people hooked. Rich

Rich