✅ SOLVED Trying to find out what these are.

[sittyboy]

I thought maybe they were some sort of fence caps. They do spin.

 

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[taz42o]

They are called armillary spheres.

 

[BosnMate]

They are called armillary spheres.

OK, I go for that, what are they used for?

 

[taz42o]

To map the constellations. With no markings they were probably decoration .

Armillary sphere - Wikipedia, the free encyclopedia

http://inventors.about.com/od/astartinventions/a/armillarysphere.htm

 

[sittyboy]

Thanks taz42o! At least I know what to research now!! lol