What are these metal balls, hanging from chains, on the back of this tank's turret? : r/whatisthisthing

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For the identification of mysterious objects

Something made out of metal. The top part can be screwed off, but

What are the small balls hanging behind MBT turrets? - Quora

What are these metal balls, hanging from chains, on the back of

What are the small balls hanging behind MBT turrets? - Quora

Approximately 2.5m tank like object. Appears to be a lid on top

Was digging in an area that used to be an allotment. We found this

For the identification of mysterious objects

What's this thing on the back of the turrets on American tanks