What is this?

Clue, it is pure > 99% copper. A very nice Chilean 500 peso UNC and 2008 Chiie error coin for the correct answer.

 

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Some sort of ancient saw??

 

Cut out pipe

 

Extra copper

 

A coin or trading device

 

In what context?

 

From minting a coin

 

Can be considered as "extra copper" from the final product, but not minting specifically.

 

Mining, coins melted down, improper stryking

 

Looks like the remnants of a coin tree such as produced by some Asian mints.

 

Extra copper from making weapons.

 

Shavings from a cut planchet

 

Shavings from a drilled copper pipe

 

Sea treasure

 

Some sort of copper mold...

 

Key??

 

Not yet, it is produced using large amounts of electricity

 

Extra copper from making copper wire...

 

worn out zipper

 

Left over copper from elecro-Refining copper...