Green and gold illustration of a duck on green water with gold text and with a black half circle with gold text and a gold sky with black text
The Green Duck Metal Stamping Company was founded by George G. Greenburg and Harvey Ducgheisel in 1906 in Chicago, Illinois. They initially provided metal stamped medals, tokens, badges, and even casino chips, but also specialized in pinback buttons, advertising signs, and key tags. In 2004, after nearly a century of operating, Green Duck could not sustain operations and went out of business. Many of their buttons are considered collectors' items and can be found in popular archives such as Hakes Americana & Collectibles.
Source: Homren, W. (2012) Green [space] Duck was originally Greenduck Corporation, The E-Sylum, 13(50). Retrieved from: http://www.coinbooks.org/esylum_v13n50a16.html