I have a Martin Sigma model SBF2-6, made by Tokai in 1973, I have owned it around 30 years, It is in mint condition, it has a tele deluxe style body with a gibson looking neck. I would appreciate any info, including current market value, collector status, production numbers, etc. I have not had much luck finding any info on the net, and Vintage Guitar Price Guide, does not give a current value, but just that it was made by Tokai for Martin in 1973, and only produced 1 year. Thanks for any info