Sign from the Deep.

[water logged]

Took my brother in law and nephew out for a 2 hour lake hunt and found the usual trash items along with some pocket change and this sweet old brass sign.
I cant tell if it's a sign or stencil or both?
Anyone from Michigan or the northeast ever see this. Click for super size.

 

[scubadetector]

n/t

 

[water logged]

Measures 11 1/2 inches across, hope i can find the rest before the ice hits us up here.