Assay Medals were struck from 1860 to 1977. Metals included Copper, Silver, Aluminum, White Metal, Pewter and a single gold medal.
The "AC" number classification was introduced by Julian and Keusch in an article in the Token and Medal Society Journal 29:5(2) (1989).
All silver Assay Medals are RARE with distribution limited to fewer than 55 pieces for any given year.
The list below includes only years in which Julian indicates at least one piece struck in silver.