The attached letter will, I think, be found of general interest. The term “Semi-Proof” is new to me in the Mint records and perhaps
means one of two scenarios.
1) Regular planchets struck with proof dies, or
2) Proof planchets struck with regular dies in a standard coining press.
The second option is the more likely.
It is also of interest to note that Pollock charged the director $1.10 for each Trade dollar.
Interesting. While I'm sure plenty have marketers have used the term "semi-proof" to spruce up the perceived value of a
piece they're selling, this is the first time I recall seeing the term used by the U.S. Mint. Is anyone familiar with this usage?