U.S. National Archives (Record Group 104 [Denver], Sequence 23, Annual Reports, 1873-1975)
Annual Reports of the Director of the Mint to Secretary of the Treasure. 1907-1953; Miscellaneous Registers, Ledgers, Letter Press Books and Other Bound Volumes (1873-1975).
National Archives series identifier is 8NS-104-95-027. This series currently (6/2018) does not have an entry in the NARA online catalog. See also the National Archives & Records Administration numismatic finding aids at https://nnp.wustl.edu/library/archivedetail/538870.
Scanned at the National Archives in Denver, courtesy of John Graffeo.