Eryn, I bought a 1973 ConcertBass amp and 415M cabinet when I was in High School in 1978. The cabinet is covered with (standard at that time I suppose) black tolex vinyl, had four rubber feet on one side and two handles on the other. The grille was the silver Sunn cloth (still available from Fender I believe) with the Sunn logo on a metal plate in the upper left corner. A metal plate on the upper left corner of the back has the model, impedance etc info. Sorry, but I have never seen a brochure or catalog with this cabinet, so I don't have a photo. In fact, you are the first person I found with a 415M cabinet since I bought it in '78. It seems they are somewhat rare. If you come across a photo, please forward to me at bassman33428@yahoo.com