Containing material from Cohen prior to 1970:

A large picture of his 1808/7 Cohen-1 half cent.

MANA News from October 1954 and Numismatic Scrapbook Magazine article titled “Half Cent Miscellany: from December 1953 both written by Walter Breen listing 1808/7 as unique and in Cohen collection.

Abrahan Hepner obituary 1968.

Exhibition notes from GENA 11/1969.

Brochures by Paul Anderson.

List of half cents in Cohen collection as of 1967 and value of his coins in 1962.

Variety list from Breen.

Walter Breen letter 1953.