This term should be used for any alloy which appears to include copper. If you know that the item is a particular alloy (e.g. bronze, brass, gunmetal, speculum) then you can put this in the Description field. Most of the time you will be able to identify the alloy only from the appearance, weight and type of object (e.g. leaded bronze for medieval and post-med cooking vessels, or brass for Byzantine buckets, or bronze for Bronze Age objects, bell-metal for bells, speculum for Roman mirrors, etc etc) and so the identification will not be certain. Therefore if you do certainly know the type of alloy because you have had a compositional analysis, then it is very important to say this. Use copper alloy for potin coins.
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British Museum URI: 10627
We have recorded 13 examples.