The second AC 45 I picked up recently was a b block dual lug example. Wood has a nice carried feel to it with great chatter and with raw wood in the sling cutouts and under the scope rail. It's almost entirely phosphate with numbers matching throughout. The firing pin carrior is e/359 proofed but I can't see a number on it, they may have dropped serialing it by this point or it may have just faded. Mag is a late phosphate one as well. The side proof on the stock is exactly like my q block panel cut, I have talked with some other collectors and it seems there is a feeling a curved, keel type proof punch was used sporadically late in the war on the side which gives the deeper indentations on the outside wings of the eagle.
Nick
Nick