For Sale: OT: Yamaha S-50A steel string 'folk' guitar

Real paucity of info on these but I did find this in a discussion

Between the solid wood Dynamics and the laminate FGs came the S-series Dynamics...Yamahas first attempt at all laminated guitars...so far thought to have come in two versions...the S-50 and S-70...I own one of each and they are OK but not nearly as nice sounding as the solid Dynamics...labels looked like this...
So good luck trying to figure it all out on Yamaha, theres a certain amout of the unknown that Yamaha owners just have to live with...to this point anyways...who knows maybe someday a former employee will write a book that puts an end to all the specuation, `til then some things are just that, speculation.

http://i72.photobucket.com/albums/i198/shot-glass/newyears2007001.jpg

and that recent ebay link:

http://www.ebay.co.uk/itm/YAMAHA-S-50A-NIPPON-GAKKI-MADE-IN-JAPAN-VINTAGE-ACOUSTIC-FOLK-GUITAR-MIJ-/181035392723?nma=true&si=Nyk9k4Fu%252F5ElD3FFYIsSRh73YPE%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557