Hellbox Press (New York, N.Y.)

found: John Fass website, viewed October 27, 2021:Miniature Printing Presses Created by John Fass (In the mid 1920s John began using these mini printing presses to create Christmas cards, bookplates and other ephemera, to give to his friends. He named this press the Hell-Box Press, named for the print shop hellbox which letterpress printers use to store type after it is used on the press ... In 1938 John produced his Hellbox masterwork, a mini type-specimen booklet titled The Hellbox Press Specimen Book) - https://www.hammercreek.org/2011/09/my-entry-12.html