Lock at the 1840s house

[DigToChina]

Hi all,

Tomorrow is a wash out so tonight, I went back to the place I found the LCs and square nails last weekend. I only found a couple of Pennie’s from the forties, some lantern bits and this lock which is pretty interesting. I’d anyone has any info on what kind of lock this is and approximately how old, would definitely appreciate you sharing. It appears to be made of brass and cleaned beautifully with some HP magic sauce. It also has no marks other than the 8 on the shackle.

 

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[Gare]

Nice find DigToChina AND NICE posting Jeff !1

 

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[DigToChina]

Why is it green if it is brass? I thought Copper is what Oxidizes.

Brass is a copper/zinc alloy.

 

[DigToChina]

I would think one of these areas to measure,
but
View attachment 2085207

Looks like you have a winner with #40 Jeff. 😁 Vertical axis is exactly 2 1/8”. Appreciate the help on IDing the lock.
Dig