Who wants to see my buried treasure find?

[BurriedTreasure]

Found this today digging in the garden. No idea what it is, or how old it is, or if it’s even really old! But very exciting for me! Any guesses on what it is or advice on how to clean it up?

Do not clean it. Maybe brush it off. Any cleaning could damage it and decrease any value.

I'd call local museum in the morning or maybe join Dawns Diggers on FB.

What did the pros think it was?