Clearly my ignorance showing.
I have no insecurities about being so--it offers a great chance to learn when knowledgeable folks correct me. Questions/wrong posits help shape the parameters of knowing a thing. Awareness of ignorance can therefore be an accelerant for expanding knowledge. I look forward to learning a heck of a lot more from y'all. I appreciate the broader welcome and invite your (plural) correction.
I'm still learning the lay-of-the-land, so to speak, so had no awareness this was a "37 CWC bent tank model thread," and had in fact missed an earlier comment identifying it as a '37 CWC.
Among the many things I've already taken away from this thread is that identical production parts were "badged and sold thru different suppliers."
Finally, I didn't mean or want to cause a ruckus and it's already water under the bridge; I was a bit pissy in my response. Superman1984 and Freqman1, et al, I'd appreciate the opportunity to tap your insight and expertise in the future...