"Heavy, made of cast iron. It’s from the 1970s, or older. Given to my dad by his mom- might be something she bought, or passed down from her own mother. They live in a majority Amish town in Ohio."
A: "It looks like it may have been an egg timer originally"
To remove the scale that's already there, just soak the faucets in simple lemon juice, available at any grocery store. Cheap, no harsh chemicals. Wipe away scale after 30 minutes.
https://earth.google.com/web/@-54.66239115,-36.19531314,957.24274773a,559.044623
66d,35y,0.11594552h,0t,0r
The beacon says "UFO crash"