i'm just looking for info on my amp, origins, when it was made, anything.i hope these links work

http://img1.classistatic.com/cps/l/kj/09/1/2/284/r1/3593k42 _20.jpeg

http://img1.classistatic.com/cps/l/kj/09/1/2/284/r4/2499m0h _20.jpeg

this thing has got punch, but i really want to know more about it before i start replacing parts. thanks.