There were a bunch that just went at a few local auctions. I was hoping to get my hands on a 2.5 or 5 gallon, but the prices went up higher than I wanted.
I guess the sealant was asphaltium, what ever that is.
I haven't seen the ones woth the spot-welded frames. The ones I have seen were fully welded, smoothed out, and polished. A much cleaner look. That one must have been after the Metaframe company sold off that portion of the business to Mattel (they had patents on the design).
I usually feel kind of guilty using the quick reply... my replies are rarely quick.