Either the marriage or birth date (with a three year difference) is not accurate.3
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A Frederick Antes was treasurer of the county [Northumberland, PA] longer than any other incumbent of that position. He was first appointed in 1782, Serving until December, 1784, and was reappointed in 1788, serving probably until his death in 1801. His accounts were audited on several occasions, but, owing to the fluctuating value of the currency and various other causes, there was a considerable discrepancy between them and those of the commissioners when his successor assumed office.1488
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[A] Frederick Antes was elected county treasurer in February, 1782; October 20, 1783, he was appointed; John Buyers was elected, December 31, 1784, and January 3, 1786. Buyers also held the office in 1787 and 1788. After this, Frederick Antes was treasurer for a number of years - probably from 1788 to 1801, certainly from June 1, 1789, to January 1, 1794, in 1797-98, and in 1800-01. He died in 1801.1489 See also1490

[These references above may be related to a different Frederick Antes. Possibly Col. Phillip Frederick Antes 1730-1801]