What is this?

[stewburner3rd]

Hello this is my first find with my new Christmas present. Any ideas what it is? Maybe a valve or pulley?

 

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[Helix]

Wow That's a cool Relic! Can't say I have found one of them before. Part of a hit or miss engine?

 

[Tony in SC]

What size is it? Tony

 

[stewburner3rd]

Thanks for replying. I looked up hit and miss engine and it does look like one of the wheels. It is 7 1/2 inches

 

[treblehunter]

looks like the bottom of an oil filter?