Saw that as well and found a couple issues. That isn't the correct dome for it and the tag shows the date of 1965 vs a month numeric hypen two digit date which is what NA Sig did for the period.
There are other potential issues;
The internals look like the 1980s or 1990s style (although admittedly NA Signal didn't change designs much). The bulb holders in older ones are rounded at the edges, the newer ones are squared off on the corners. I believe this change started around the late 1980s or 1990ish. The top one is the "old" style the bottom is the "new".
The name plate looks wrong to me but I can't say 100% they never did them this way or when that label style started being used (again things haven't changed much with this company). I guess that the name plate could be correct maybe they didn't always stamp the month and used a larger number punch. Just something about the label combined with the date stamp still looks wrong to me. Top is what I am used to seeing, bottom is the light in question.
The dome is
defiantly not right and looks like it is Unity. Top is what it should look like, bottom is the one in question.
Below are the early 90s versions in catalogs (doesn't show a lot). The rotating beacons used similar bulb holders so you might be able to make out the "new" squared off bulb holders somewhere in these early 1990s example pages.
And here are full pics of what I think it should look like from the late 1960s until the late 1980s
VS what is listed
In summary, I could be wrong on the name plate or maybe even the bulb holders, but the dome is wrong for sure and the price is way too high for a mix-n-match beacon IMHO. Thanks for coming to my NA Signal legitimacy TED Talk.