Kennypane,
That is the problem when the company history is not known to many and there may not be documents or complete documents on its history or the watches it produces.
As for the watch in question, it has to come to a conclusion. Both brands involved are unable to provide conclusive evidence of they ever making the said watch. However based on experience and what I have read (not from that thread), the places the owner went, though representing the brand may not be the final authority in confirming or not the existence of the watch. Perhaps a trip to the hq of the brands involved may reveal more evidence or truth of the watch. As it stands, it does not look good.
As for the actions of the thread starter, we can only guess what is his or her true intentions. Be it to inform, educate or otherwise. But subsequent action by said poster does leave doubts of his intentions and credibility. Calling out others as cheats and/ or forgers does not bode well either. As one of the guys the poster had accuse of cheating explained, he does not doubt the originality of the parts of the watch and that in the course of the watch life, it may have had parts replaced (original and true to the era, but may not be true to the watch) and the final product is what he or she has in hand.
As with any vintage military watches, these watches were designed to work in the field and many times, replacement parts may be difficult to get. The service Center for these watches, many a times are within the military itself and these watch makers, may and can replace parts of the watches with what ever they have to make the watch serviceable again to be reissued. I myself have faced this many times in my attempt at collecting military watches.
I do not not deny that there can and may be parties involved that can and will inflate prices for personal gains, horror stories linked to Rolex milsubs and it's pricing, but unless there is an actual exposé of these practises, it remains horror stories. Personally, if the price for the watch is too high, you cannot verify the authencity of the piece, you have doubts, step away. There will be others with provenance that will come your way. Collect those instead.