"What is this? (Repost with new pic and scale)

[InTownForNow]

Thank you so much for all the input- here is an idea of the size of the thing, as suggested.

the top:


and here is the underside:


I will try to get the rust off too, but any ideas would be helpful- Im really curious!

thanks!

[Farmerwilly2]

I'm guessing part of an old musket lock.

[pheasantplucker]

It's a quarter!!!

[Cascade Failure]

The Capone treasure Geraldo was looking for?

OK, seriously, maybe some sort of spring?

[tinknal]

I think I see Waldo.

[rean]

to me it looks like a broken knife from an old meat grinder.

[Big Dave]

Where, how did YA find it?

[Nature_Lover]

Its a sash lock from an old double-hung wooden window.

http://www.historichomehardware.com/...ks-c-4_14.html

...or it could just be a quarter.

[Ravenlost]

It's a rusty piece of metal next to a quarter and a ruler.

[Ross]

Sash lock sounds right to me.

[Bret4207]

Sash lock or a hinge. Does it matter at this point?

[InTownForNow]

no it doesn't matter. I just was wondering. ANd to the op- we found it in the back yard.

[oldmanriver]

ok it was a nut that went on a horse drawn plow it was to hold the side blades on . it was made so you could take it on or of with the tap of a hammer da da da