David here's a Roman parallel that may show this is going in the right
direction for you.....
Antoninus Pius Denarius (AR) Click on the image at the bottom of the page.
From: British archaeology discussion list [mailto:[log in to unmask]]
On Behalf Of David Hayward
Sent: 02 February 2010 10:28
To: [log in to unmask]
Subject: [BRITARCH] Coin Weight/ Mystery Object
I am no expert on this but I understand the weight and value of the Aureus
changed over the Roman period right up to the early 4thC. I would hope that
the experts will weigh it and come up with a date, probably era is a better
word, in due course!