I bought it. Did not notice this thread though
Don't know how wisely I spent my money here, but I wanted it for long time use and it seemed like a safe bet for one to keep. I felt better buying from an enthusiast who'd be sure to disclose the real nature of the keyboard than trying to wade through sellers on eBay claiming NIB or rarity with varying honesty. But, to be honest, I don't know about the model for sure since I've seen such mixed info... and it's hard to find good data on models and prices and such. I haven't seen them for sale much but I've also read a random remark here about how common that model is compared to other industrial ones.
I've only seen 1394946 come with straight up PS/2 cables before, and 1390653 with the metal AT adapter, I wonder if its from another board or if some 1394946 came with the AT originally. The logo E TwentyNine commented on is the standard one for the model though as far as I know.
By the way, anyone notice the much more enthusiastic comments-section for the keyboard? Must be the new year; I haven't seen even rare unopened ones get more than a rundown of facts on clickykeyboards before