Wow i've been looking for a place like this for ever!
I bought a Sigma DM3 from a buddy in high school in 1988. Paid 10$ for it The guitar was in good shape but the case is made out of some kind of cardboard ( propably not original ...) I've been trying to find info on SIGMA's for a couple years now but even MARTIN's web site is not very usefull. Anybody know where I can get info on my guitar? Date of manufacture and stuff like that?