I dont know if anyone has seen these yet, but here are a couple of old yamaha catalogs..pretty cool! I found them on AGF.
I also just picked up a great condition fg-170 (greenlabel) on my local craigslist. Awesome guitar for dirt cheap!
http://www.t-shiga.com/sub7-5-1-7.htm
http://www.t-shiga.com/sub7-5-1-8.htm
http://www.t-shiga.com/sub7-5-1-9.htm
http://www.t-shiga.com/sub7-5-1-10.htm
http://www.t-shiga.com/sub7-5-1-11.htm
http://www.t-shiga.com/sub7-5-1-61.htm