ID these headlight mounts

It's all semantics, but to me those are headlight mounts AND buckets- the mounts are the parts that bolt to the fender fronts, the buckets are the part that attaches to the mounts and actually hold the headlights. Looks like you've got them both. As for what they fit, I've got nothing to compare them to; but since they're bolt on (not welded on) mounts, and quad headlights, my SWAG is mid 60's B or C body (Newport?). Definitely not A body unless an early 60s toad.