Large round iron/brass item

[pa-dirt_nc-sand]

Dug this at lunch in swampy area of 1800's farm site. It rang up in the silver/brass high range when in the hole and still rings high when sweeping with the detector? Some rusty iron rings high until I pull it out then it rings the proper iron.

Any ideas? It is fairly magnetic and weighs less than a typical iron farm washer. Worth electrolysis or just take a hammer to it?

 

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[Mud Hut]

Give it a electrolysis treatment .. what do you have to lose?

 

[pa-dirt_nc-sand]

Decided to take it back to the dock and drop it on the cement several times, rust came off easily. It is actually old iron, no brass, just junk.