Scotty: I received some eMails and PMs. None offered anything new. Yours was the only gun with the C suffix. I liked all the theories that were posted here, any or all could be correct. Like you, I have discussed this with Glen Jensen. I think the answers to these questions are with the FN folks in Belgium. They may not have survived WW2. Thanks again for your interest and posts and photos of your go-to bird gun. One of my guns also has many cracks in the stock, and the rib is loose. It still shoots good ,and I watch it very closely. David