I bought a dozen or so Bean Mallards in 82 or 83, when they went on sale for 12 or 15, bucks per decoy. Bought some Canada geese also, very cheap at the time.
The heads on my Bean Mallards are Stone UGLY! I believe the worst heads they ever put on their decoys....
That said - I believe your decoys are pre - early 1980's. Ugly heads and all, I killed lots of ducks over those decoys, on Big Water hunts.
Repainted them all. They are still rigged, with long lines and heavy anchors. Ready for Duty.
So, paint em up, and put em back to work & Good Luck!