Veitel-Heine Ephraim was Jeweller to the Prussia

Prussia

Prussia was a German kingdom and historic state originating out of the Duchy of Prussia and the Margraviate of Brandenburg. For centuries, the House of Hohenzollern ruled Prussia, successfully expanding its size by way of an unusually well-organized and effective army. Prussia shaped the history...

n Court and Mint

Mint (coin)

A mint is an industrial facility which manufactures coins for currency.The history of mints correlates closely with the history of coins. One difference is that the history of the mint is usually closely tied to the political situation of an era...

 Master under the Prussian Kings Frederick William I

Frederick William I of Prussia

Frederick William I of the House of Hohenzollern, was the King in Prussia and Elector of Brandenburg from 1713 until his death...

 and Frederick the Great

Frederick II of Prussia

Frederick II was a King in Prussia and a King of Prussia from the Hohenzollern dynasty. In his role as a prince-elector of the Holy Roman Empire, he was also Elector of Brandenburg. He was in personal union the sovereign prince of the Principality of Neuchâtel...

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He became infamous for debasing the currency on behalf of Frederick the Great in order to finance the Seven Years' War

Seven Years' War

The Seven Years' War was a global military war between 1756 and 1763, involving most of the great powers of the time and affecting Europe, North America, Central America, the West African coast, India, and the Philippines...

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He was married to Elke Fraenkel (died 1769). He had three sons: Joseph Ephraim (1730-1786), Edel Ephraim (1728-1750) and Zacharias Ephraim (1736-1779). Zacharias married Rosine Samson who died in 1803. Their daughter Rosette Ephraim married Heimann Fraenkel (1748-1824) who was Elke's grandson.
References: Forgotten Fragments of the History of an Old Jewish Family by Louis and Henry Fraenkel