So I bought a pipe yesterday, and it's a KSI. I'll have pictures soon, but for now the only info I have is near where the stem meets the shank, it has 643 A. The "A' though, appears to be Masonic. However, I can't tell for sure because it is fairly small, so not a huge ammount of detail is there. Just looking to see if anyone here might be able to shed some light on this pipe. I tried looking it up, but KSI pipes don't seem too popular. Looks like a nice one though.