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"A guinea coined by George III during the period 1787-99. It is now so called because the shield of arms on the reverse has the shape of the spade of playing cards." &mdash;Whitney, 1889 <p>The obverse of the coin carries George III's profile.

Spade Guinea Coined by George III, Obverse

"A guinea coined by George III during the period 1787-99. It is now so called because the shield of…

"A guinea coined by George III during the period 1787-99. It is now so called because the shield of arms on the reverse has the shape of the spade of playing cards." &mdash;Whitney, 1889

Spade Guinea Coined by George III, Reverse

"A guinea coined by George III during the period 1787-99. It is now so called because the shield of…