I opened the right Sony SS-3300 speaker cabinet yesterday morning and the 1973 water damage has left its legacy. Tests have revealed blown tweeters in both cabinets.
The tweeter is damaged and the woofer is a bit soft and flabby having been used too soon after the water ingress. The cabinet has been previously opened on at least one occasion as three screws are missing in the top left hand corner. Besides the obvious broken switch shafts the mounting nut on the two way rotary wafer switch is missing. The solder tags are corroded and connecting resistor is disconnected.
It will be an interesting project. I will post the images on my Flickr account.