That’s actually funny you say that! And I don’t mean that as a knock. Back when I got mine, it was sold as a “BNZ 44”. Plain and simple. the late characteristics that clearly identify this as at the very end of steyr production in ‘45 were not so well known. There was no Kreigsmodell book, and many folks accepted the receiver markings at face value. Serial number studies were coming together but it was a slow process and not so widely shared and available as they are now. Thx to mike and Bruce we’re all pretty well educated these days. What makes this a late’45 steyr? We know that the T block was the final one. We know they only started using KM stocks in late 44 in the q block. And by the end of the q block the receiver was ‘45 marked. We know that the rough shroud you see here only appeared in the S block. We know phosphate finished receivers only appeared mid S block. We know that the final acceptance was not on the top as here on BNZ 44s. Lots of small clues that are recognized thru experience, or the Book. So when you see all these characteristics on a BNZ 44 we know it has to be a leftover receiver. Now u just say “T block” as shorthand. It wasn’t always that way, and not always so obvious. In some ways it was a bit more fun, since advanced knowledge was an edge in recognizing a cool oddball like this and finding a deal or steal. Often the dealers didn’t know either but now they all quote Kreigsmodell in their descriptions. Knowledge is truely power and ho, the and it’s a pretty level field. End of day I think we and the hobby are all better for it.