Thanks for the responses, folks!!
I took another look at mine; at 98,xxx it's not as old as Dave's. But it has tan rivet pads all the way up and down & definitely a low action. Unfortunately, though the horn is mechanically very tight, too many pads are blown out or hardened to really play it. That's what sixty years under a bed will do, I guess.
The pads appear to be pretty thick; is that a standard thing for Kings, like Martin usually used thin pads?
I'm getting ready to finally start my overhaul project on my Buescher alto & I figured I would order pads for this horn the same time I ordered the others. I'm sort of tempted to order plain rivet pads as a replacement to hear that old time tone Dave describes but I'm sure I'll order flat metal resonators for it.