Martin & Co. DCX1E
I believe the D stands "Dreadnought" and the C stands for "Cut-way"
and I think the X1 is for "X-series" or for A-Frame ''X-1'' and the E for "Electric"??
I don't know if I right but I would like to know if I am or not.
And also tell me, if I am wrong, what it might stands...