This article was written in the mid 1950s but contains very interesting history of the use of Nickel, CuNi and Cu in coinage. Also there is a discription of RCMint operations in the 1950s. One of the most interesting articles I've read in a long time.
“The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.” – George Bernard Shaw. Why Copper Bullion ~~~ Interview with Silver Bullion Producer Market Harmony Passive Income blog