Some kind of mount?

[Garabaldi]

Any ideas?

 

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[Bigcypresshunter]

Looks like a small engine carb or exhaust gasket.

 

[stefen]

There are bezels for small cabinet knobs that have the same shape are are typically brass...victorian era

 

[creskol]

I think that may be the base plate of a turn catch

 

[stefen]

I think that may be the base plate of a turn catch

Thats the term I was looking for...

 

[traderoftreasures]

i found something similar at an old site.

 

[hunterV3]

Bottom of some kind of lock?

 

[Garabaldi]

Thats it trader, you got it.