Plastic chrome cover cap for original kitchen faucet....
... from 1978.
If you need one, I have one for you. Just be at least moderately patient for me to ship and pay the shipping - should be three or four bucks.
Let me know if you need it!
"Between what matters and what seems to matter, how should the world we know judge wisely?" - E.C. Bentley, Trent's Last Case