My 40 wagon had one of those in it when I bought it in 1973. Definitely "Industria Argentina"! Back in the 60s probably where JC Whitney got theirs too.
Slightly off topic, but the grill that came with my '39 Deluxe Fordor was stamped "Argentina". Painted silver with no stainless steel strips and no chrome center piece.
Guessing this one has similar origins and the comment about JC Whitney very plausible.