I believe that most, if not all, of those high-walkway tanks are PTC cars. A century later, there is probably no way to know for certain short of a photo showing the original pressure test data.

As an aside, I did some poking around and I believe the actual STC shop was immediately southeast of downtown Masury, Ohio, and is currently Bull Moose Tube, and that the PTC shop was one or more of the current Lee Industrial Properties and Ohio Steel Sheet and Plate.

David Thompson

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