Not sure anyone was paying attention to this thread, but just to close it out this bat sold for $14K. I did not bid on it but concluded it was a legit 1946 or 47 Williams bat with likely use by another player as well after reviewing the markings. It is NOT a 1939-41 bat as claimed based on the center brand and Powerized but it does look like a legit 1944-1948 bat as PSA had concluded. Wiliams did not order bats in 1943-45 I believe the model numbers phased in until about 1946 and 1947 and this bat was likely made for Williams from a pre-war blank after the war. MEARS incorrectly concluded 1939-1943 simply based on the lack of model number I think. But the markings are not from that period IMHO. Regardless the weird OH or HO marking on the knob is a problem obviously unless someone can explain it.

Hope this is useful commentary to someone!