Vintage Mold-cast Metal Chess Pcs. Complete Set No Board CAVALIER ?

Description

Offered here is a complete set of vintage chess pieces.
They come in a Cavalier Chess box.
However, I don't know if this this is the original box.
When I searched the internet for metal Cavalier chess sets
I don't see anything resembling these.
All pieces appear to be the same for each side except for the kings. I've included close-ups of the kings so you can see how they differ.
The silver pieces have red felt bottoms.
The gold pieces have green felt bottoms.
I don't really know what kind of metal these are, though I suspect pewter.
I did notice that one of the queen's noses is somewhat flattened, suggesting a soft metal.
They do have cast-mold marks and are pretty heavy.
They look fairly vintage; I would guess 1950s or earlier.
The kings are about 3.25" tall.
The set weighs close to 5 lbs.