"GADGET" Need help to identify

[Bruce Ct]

I found this gadget thing at a colonial era sight i've been searching.
The side says PATD MARCH 2 1875.
The base has a couple screw mounting holes and the holes at each end appear to be mounting holes. The things at the top appear to be finger levers or something.
Overall size is about 4 in x 3 in.
Thanks for the help

 

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[flyadive]

Window lock?

 

[TNGUNS]

Looks like a trigger mechanism for something.

 

[GaRebel1861]

Window lock?

That's what I think too.

 

[NOLA_Ken]

Definitely a window lock. I saw some similar to it at the salvage store a while back, not quite as ornate as yours though.