Another brass thing..

[jgowans]

I found this at an old farm site. It has a tapered spinning part and a little more than half a disc.
I believe it is brass or copper. I don't think it is cracked but made in half a circle,

 

Amazon Forum Fav 👍

Diving for Pleasure and Treasure - Grab it through Amazon!

[Prairie Prowler]

It is the latch (Hasp) that locks a window shut ..

 

[Lucas]

Cupboard latch. There would be another plain plate.

 

[CRUSADER]

my first thought was window latch I have seen very similar, but cupboard works just as well & probably more likely

 

[sniffer]

it looks like a spinning tab to hold in screens on the outside of a house

 

[IronSpike]

Cupboard latch. There would be another plain plate.

http://www.shutterstock.com/pic-105...-view-of-a-handmade-wooden-cabinet-latch.html

 

[sniffer]

good ID

 

[CRUSADER]

Cupboard latch. There would be another plain plate.

http://www.shutterstock.com/pic-105...-view-of-a-handmade-wooden-cabinet-latch.html

thought it made sense

Good ID Lucas

plus nice picture confirmation IS

 

[jgowans]

Very cool. Thanks everyone.

 

[ipsilateral]

I agree. These are pretty recent. I think 1950's-1960's is not a bad estimate.