S.Webb, I have read your very informative history on the sigmas - thanks - I am still not sure however , what sigma model and year I have - hopefully you can help - the guitar has the sideways M on the top of the headstock - it has a spruce top and either a mahogany or rosewood side and back - the inside of the guitar is missing the label although you can see bits of the paper - on the inside on the side of one of the wood braces has the number 214 ink stamped - the guitar has aged patina - if you could help me out or anyone out there I would greatly appreciate it - thank you