Here's an [040] with the '70, '70, and '77 patents, and swirl-start threads. It's an 18 mold which may or may not be scarce, but it's the only one I've owned out of a whole bunch of similar 102 CREBS. The pic shows some amber streaking, not a bunch, but it is unusual to see these as such at all. Some factory and very shallow surface stresses, a small surface ping or two, and that 's it, overall very clean. $20 plus $5 shipping.