There is PLENTY of education within this site, more than half its content is well above my pay grade. I try to put in a bit when and where I can.
Michael is right, several mentions and photos of the Boris & Natasha Ingots at The Previous Dynasty's Museum & Theme Park. I have bought ingoted mystery metal from a couple sources over the years that bore these marks, all WW metal as it turned out. (That alone dates me a bit). So these oddball ingot moulds got made in some numbers for some period of time. More than one mould has appeared on auction sites with the requisite "RARE", "ONE-OF-A-KIND", "UNIQUE", "COLLECTIBLE", or "ANTIQUE" descriptors that such fraud sequences simply cannot exist without--and pricing that would make an oil sheik blanch. That anyone is still surprised by Lyman dimensional gymnastics or form poetry means that they haven't been paying attention.