Henry H. Leiter
Pharmacist in Pismo Beach, California.
In the depression of the 1930's, business was slow and money short. Leiter initiated the idea of using clam shells as a medium of exchange. The pieces valued at 50 cents were hand lettered and signed. (some dated 3-8-33) They were generally accepted for their amusement value and were quickly withdrawn from circulation by collectors.Source credit: Pete Smith, American Numismatic Biographies