Historical Figures

What is the value of 1928 US 100 dollar bill with a gold seal?

The 1928 series of $100 bills did not exist with a gold seal, so there’s no value assigned to that combination. There are, however, 1928 gold certificates available that may carry significant collector’s value depending on grade, signature combination, serial numbers, etc. For a good price estimate in such cases, it’s recommended to obtain evaluations from numismatists or third-party grading services who specialize in US paper money.