Are these plasters of a medal or coin? Help : )

I found these in a box I won at an auction a few years ago. Maybe someone knows of these 2 items.

 

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Here is a better image:

 

How big are they?

 

Possibly, I found the second one on a medal here

http://www.nmm.ac.uk/collections/explore/object.cfm?ID=MEC2889&picture=1#content

And here is a medal with the design from the first one.

http://www.cngcoins.com/Bid.aspx?ITEM_ID=195720

The workmanship on the second medal I listed is better than that on the plaster and there are some differences.

 

Treashunt - They measure 68.2625 mm (2 11/16")

Conder101 - Thanks for the find! I do agree that the workmanship on the medal is much better than the plaster. Again thanks :yes: