Hi, what great forum. I have found little information about Sigma's anywhere else. Sterling, you do have a great knowledge of these guitars with what seems very little information out there to help.

I'm now the proud own of a DM-19 with the "made in Japan" stamp. I'm gathering from what I have read that the top is solid spruce with lam. mahogany back and sides. I'm going to bone the nut and saddle and try ebony bridge pins.

I have a few questions. Can you date the guitar by the serial number? Which serial number do you use? I assume the body one. The number 9 in the model number is still the grading of wood used?

Thanks for the info. and knowledge