Just wanted to add one more thought. I have seen in other threads where people were referring to the "side ways M" as the symbolic M for the Martin brand that was put sideways so that when the guitar was in the playing position the M would be right side up so people would recognize it as part of the Martin brand. Well, I am not about to claim that is not what the Japanese manufacturers had in mind when they produced the gen one headstocks, but the fact that the Greek symbol for the word "SIGMA" looks like a cap M laying on it's side is kinda ironic right!