Id help for continental Stirling

Hi,

I think this is a Edward 1st imitation continental stirling but I can't be more specific than that. Would anyone have any more insight or even a reference?

weight - 1.03g
diameter - 19mm

thanks in advance.

 

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I'd go with Edward the I. Portrait is on key. Reverse marks support your claim.

This is what I' going with:

Edward I (1272-1307),
silver long cross Penny, class 3c
(c.1280-81)
(N.1022; S.1427)