Please id this strange 'coin '

This came as part of a joblot i bought locally some years ago , the main reason for buying was the english hammered silver coins in the lot . This 'coin' was in a small bag of roman and , i think , greek coins .
Anyone seen one before ?? What is it ??
it has the number '27' on both sides .

it weighs 8.8 grams .
thank in advance .

My guess - a coin weight ...
https://en.numista.com/catalogue/index.php?ct=exonumia&ttwe=y
and it may not be 27 but 2 · 7 perhaps. Traces of a dot between numbers.
Similar (but not the same) to this in that search, as an example ...
https://en.numista.com/catalogue/exonumia105787.html

Yes, a coin weight, or apothecary weight ...
https://www.londoncoins.co.uk/img.php?a=158&l=781&f=o&s=l

[Lot 781] https://www.londoncoins.co.uk/?page=Pastresults&searchterm=Coin+Weights&category=5&searchtype=1

There is a Double Moidore with 27 Shillings value (so has S 27 lettering) ...

and a Half Moidore was 13 Shillings 5.1/2 Pence value.

https://en.wikipedia.org/wiki/Moidore
So it was a weight to check the gold coin.

Lastly, it is on this page
'English Coinweights for foreign Gold Coins'
https://www.ukdfd.co.uk/ceejays_site/pages/Coinweight4.htm
under the section 'The Portuguese Moidore'

Yes , that seems to be it ,thanks everybody .