While researching for a novel, I stumbled about an interesting legal point I can't answer on my own because I neither am a lawyer nor am in the US:
Between 1945 and 1951 quite some Katana were surrendered to the occupying American forces. Many were destroyed or buried. A not too small number did end up not destroyed as ordered but taken as souvenirs by US soldiers. While ethically questionable and still an apple of contention in some way, that is not the question here.
I would like to know: how did New York Law handle the possession and carrying of (historical) swords like katana between 1945 and the 1960s?
I know that nowadays §265.01 of the NY Penal Code governs possession and transport of such 'knives', but I could only find the revisions that were made in the 2000s, but no indication that there would have been a similar law earlier.
My research gave me slight insight into the federal gun laws, for example from here, hinting me at the 1934 National Firearms Act and United States v Miller, but both dealt with firearms/firearms transport and did not address bladed weaponry.
In contrast, the Switchblade Knife Act of 1958 seems to only address short bladed weapons of specific makeup, not Katana or similar