Has anyone ever seen this?

[Ken Smith]

Originally Posted by Greg Maniero

I didn't think I had called it anything before. I don't call it a Wilfer, I just said that in 2002, that's what it was called in an appraisal. My most recent appraisal called it a German bass, I call it a bass with an ugly red refinish.

The Button stamp CM. I have seen many inscriptions. usually from an owner, shop or school. My old Shen from 1997 has KS stamped in the button. I did that!

Someone somewhere stamped it. Probably a shop if the letters are that well stamped. Individuals usually don't have stamps nor do schools. Anything is possible but I think it has little to do with the bass itself.