✅ SOLVED Found today in farm field . Brass but hollow and a flat disk of lead rattling around inside. Best guess Implement related and slot is key way

[Old Soul 71]

 

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[bradyboy]

key way for a tractor transmission, part of the shifting process
IMO

 

[Old Soul 71]

key way for a tractor transmission, part of the shifting process
IMO

Kinda what I was thinking too . Just wanted another opinion, thank you

 

[BuckleBoy]

key way for a tractor transmission, part of the shifting process
IMO

Bradyboy is correct!

 

[Charlie P. (NY)]

Looks to me to be the sliding counterweight from a feed bag scale.

 

[Old Soul 71]

Looks to me to be the sliding counterweight from a feed bag scale.

You nailed it!!!!! Thank you!