I have the same Guild as rich r (upthread) a G37 Bld. Serial no.207696 makes it mid 1970s I think. First thing to say about it is; it's bullet proof! It weighs a ton and has taken a lot of hard knocks since I bought it 2nd hand in Andy's guitar workshop, London, c1984. The low e string has always sounded dull to me (whatever strings I've tried) But it takes '13' strings and I love the neck for fingerstyle folk. Some of the tuners are slipping a bit and I don't know what to do about this.