Some vintage auction catalogs containing rare bars…
R. Green. July 31, 1954 * Thorne Mining bar #231
Schulman Coin & Mint, Inc. June 27-29, 1973 * Blake, square Thorne, Thorne #231, etc.
William H Bacon Estate Sale. October 30-31, 1979 * US Mint, Nevada, Arizona Assay, Baker/Engelhard 5 oz platinum from 1939 World's Fair
Allan Lee Scott Collection. April 28-30, 1980 * Numerous bars include Eagle, Thorne and Star Mining
S. Hallock du Pont Collection. March 4, 1983 * Carl Weigand, Tri Bullion Mining, Two Eagle Mining
Stephen Albert. September 16, 1986 * Thorne Mining bar #294