1982 Event U.S. Assay Office in New York City, New York closes 1955 Event U.S. Assay Office in Seattle, Washington closes Chase National (3rd largest bank) and Bank of the Manhattan Company (15th largest bank) merge to form Chase Manhattan 1933 Event U.S. Assay Offices in Helena Mon, Boise, Idaho and Salt Lake City, Utah closes 1927 Event U.S. Assay Office in Deadwood, South Dakota closes 1911 Event U.S. Assay Office in St. Louis, Missouri closes 1909 Event U.S. Assay Office in Salt Lake City, Utah opens 1908 Event U.S. Assay Office in Salt Lake City, Utah authorized 1898 Event U.S. Assay Office in Seattle, Washington authorized 1898 Event U.S. Assay Office in Deadwood, South Dakota opens 1896 Event U.S. Assay Office in Deadwood South Dakota authorized 1881 Event U.S. Assay Office in St. Louis, Missouri opens 1881 Event U.S. Assay Office in St. Louis, Missouri authorized 1877 Event U.S. Assay Office in Helena, Montana opens 1876 Event New Orleans Mint reopens as an assay office 1874 Event U.S. Assay Office in Helena, Montana authorized 1869 Event U.S. Assay Office in Boise, Idaho authorized 1854 Event U.S. Assay Office in New York City, New York opens 1853 Event U.S. Assay Office in New York City authorized
