This one has me stumped.

[Lowjiber]

I'm not much of a relic guy, but can usually figure out what something mechanical actually is. However, this one has me stumped.

I dug it yesterday at about 5 in a park that was built in the 1940's. The material appears to be bronze...judging from it's hardness and the scratches I made with the Lesche when digging it.

Obviously (at least to me), it is an adjusting device of some sort. I think the ball-like end of the screw fit in a depression, and when the screw was turned, the plate put more (or less) pressure on something. The flutes have me really stumped as to their function in my theory.

Any ideas

[yazoo]

Looks like some sorta inner workings to a pressure relief valve of some sort.The center part looks to be able to be seated .H.H. Yazoo

[coinnut]

No clue on that one John. At first glance it looked like an old thermostat from a car. But it ain't lol Hope someone sheds some light on it.

[Ferrous]

It's the spinner out of a sprinkler head. That looks like a Boulder City find.

[Lowjiber]

It's the spinner out of a sprinkler head. That looks like a Boulder City find.

Bruce...You are a genius!!! Yes, it is a Boulder City find. It came from that park you told me about between the bowling alley and the police station.

Thanks Buddy!!! See you in Maythinkingabout:

[BOWSER]

gee i was in Boulder City 20 years ago and there was only 1 little square of grass

[coinnut]

It's the spinner out of a sprinkler head. That looks like a Boulder City find.

That's funny. I looked at that thing for 10 minutes and couldn't figure it out. Not even a wild guess. The minute you said what it was it all made sense Great ID on it. It would have been in my UFO pile forever

[SeabeeRon]

WTG Bruce!! We got some smart fellers here!

[CyberSage]

That would be a US Quarter in the first photograph I believe.