(Dec 21, 2015)
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Rev. Maria Theresa kneeling to Frederick the Great, who brandishes a sword above her head
Pinchbeck with traces of gold colour remaining 24mm
In the 1700s he invented the alloy Pinchbeck a cheap substitute for gold
Pinchbeck is a form of brass, an alloy of copper and zinc mixed in proportions so that it closely resembles gold in appearance
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