Vintage Hard Rubber King “Equa-Tru” alto mouthpiece in good condition. No facing markings, but it appears to be a very small tip opening, typical of this era of mouthpiece which features a short shank, low floor, hollowed out sidewalls and round chamber. There are minor scratches on the bite area, but tip and rails are good. This is the mouthpiece they would have included with their older model, vintage altos.
This would be an excellent piece for a vintage alto or someone who wants that older style mouthpiece, but you will need a pretty stiff reed to make it work for you.
No Ligature or Cap.