c. 1806 1807 King George III British Halfpenny Counterstamp Jˢ DUNN Merchant?

Description

Terrific old copper coin with a neat counterstamp on both obverse and reverse
J
ˢ
DUNN - I think this is the name James Dunn and is likely a merchant using this for advertising or as a token to be spent in his shop.
However, there may be other reasons for this stamp.  Sized about 28mm & 7.9g.  The host coin is a British halfpenny of King George III of the style issued during the years 1806 and 1807 but the date on this piece is not readable.
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The items pictured are the items you will receive.
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One cent coin is included in the images for size reference only and is not a part of this auction listing.***
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