this one should be easy

[unclemac]

found on the beach, made of brass, can't quite place it.

 

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[willie d]

If the center is hollow and threaded, then I will say it's a finial, possibly to a lamp. If not, then I cannot help.

 

[AC1955]

Finial or flagpole top? Is it threaded?

 

[JimDon]

Actually it appears to be a curtain rod finial. Seen many similar ones for sale.

 

[PYRATE]

looks like a Sleestak from the tv show Land of the Lost that I watched back in the 70s