This is my first post (yay!). I just picked up a pair of 1972 La Scala speakers (AA Crossover, K77 and K55 horns and WW2 capss). These have screw on tops as well. Black badges and 1/4 Jack's tell me this is an industrial version. A friend who is a refinishing carpenter will be giving these a cosmetic restoration shortly. I will post before and after pics. Love the original post. Those are lovely! Cheers!