I had this RubberSet 55-3, that I'd bought, come in the mail today. From my limited experience with this kind of thing, I'm going to venture that it doesn't look to be in "bad" shape. Not mint by any stretch of the imagination, but not terrible. The knot seems to be in halfway decent shape. It's soft and pliable, if that means anything. I'm contemplating how to proceed with this thing from here. The collector in me says do nothing beyond maybe rudimentary cleaning. Do I use it? Do I "look at it?" Is there a reference anywhere that will tell what type of knot it came with and other pertinent information concerning this particular model?