I have acquired what appears to be a 1970 GCS-7. The paper label is all but removed, however, it has an adjustable bridge and the "zeroth" fret which narrows down the production year (according to Sterling Webb's descriptions). It looks just like the Martin 000-21 with rosewood back and sides. I've never seen one of these before, so I have no idea of it's value (compared to the DR-7 which are always coming up on EBay these days it seems) since there is little to compare it to. I am also the proud owner of 2 Japanese made DR-28's as well as a D-10 Anniversary model, all in great condition. I am looking to sell the GCS-7 as well as possibly one of the DR-28's. Email me if you have any interest. knoxsteinbach@juno.com