Vernon, Dai: Spellbound ©1946 Stars of Magic, Inc., NY Softcover, folded manuscript, 8.5x11", 4 pages

Image courtesy eBay seller GrandHoudini

Comments: Photographic interpretation by George Karger, edited by George Starke. Stars of Magic Series 2, No. 3. Later part of the compilation book Stars of Magic, edited by George Starke.
Effect:
"The effect involves a series of remarkable and inexplicable changes of two coins of the same size but minted from different metals, such as a half dollar and an English penny."

Contents (based on entry in Stars of Magic):

1 Effect
2 Explanation of Sleight
2 Instructions
4 Conclusion