an all original pair of JBL D-120F's. They have the aluminum dust covers, all paper cone/surround and are grey frame with a yellow sticker. The seller told me he would take them back if I found the cones weren't original. They have been sitting in a closet for about 20 years.
What else do I need to look for on the cones?
What else do I need to look for on the cones?