This is a book titled "Medals of the United States Assay Commission 1860 -1977" by R.W. Julian and Ernest Keusch.  It was published by the Token and Medal Society in 1989.   There are 89 pages in this 8 and one half inch x 11 inch soft cover book.   There are numerous photos throughout the book with a full description and background information on each medal.  Please add $5.50 for shipping cost to all Canadian addresses and $8.00 to all United States addresses.