Maybe have better luck with an ID for these shift knobs, two of them were in a can in a washtub full of parts I bought. Looks like they're for a column shift lever. Lyon aftermarket maybe? Not Imperial, doesn't appear to be Crown Vic. Maybe they're later, size-wise they could fit most anything up into the 80s, but being clear I would think they're no newer than late 60s. Threads are fairly small but it's been a while since I took a knob off to know if these are very different.
Could very well be a faucet knob, off one of those single lever faucets. Late '50s, early '60s would be my guess... The plastic shift knobs were almost always pressed or molded on, I don't recall seeing many that threaded on.