"Unique" 1942 Glass Experimental Discovered - RB 42-70, Judd 2069

Only known intact glass example of 1942 coinage experiments. A 1942 coinage experimental piece made in glass by the Blue Ridge Glass Company hasbeen discovered by numismatic researcher Roger W. Burdette and certified by PCGS with number 81700131, graded "PR-64." The glass experimental pieceis presently held in a private collection.

The piece is made from tempered, yellow-amber transparent glass. It is identical in die alignment to the only other known example, which is brokenin half. This is described and illustrated on pages 95-96 of the book Pattern and Experimental Pieces of WW-II by Burdette.

Background
During 1942 the U.S. Mint was searching for a substitute for copper used in the common one-cent coin. Copper was a critical war material and the WarProduction Board refused to allocate enough to the Mint to make cents for the next year. The Mint Bureau began internal experiments that eventuallyled to adoption of zinc coated steel for the 1943 coins. But the Mint also invited private companies to test various types of plastic in the eventmetals were not available.

Several makers of plastic buttons and other small items were loaned a pair of cent-size medal dies prepared by Mint engraver John Sinnock. Theobverse included a portrait of Liberty copied from the Columbia two centavos. The reverse design was a simple wreath designed by Anthony Paquet inthe mid-nineteenth century with the words "United States Mint" added in the center.

The experiments were publicized in trade magazines and officials at Blue Ridge Glass Company in Kingsport, Tennessee, asked to participate. TheMint had a pair of used dies sent from Colt Manufacturing Co., one of the plastics experimenters, and Blue Ridge obtained tempered glass "blanks" (or"preforms") from Corning Glass Co.

Blue Ridge had considerable difficulty in making glass 1942 sample coins. For impressing a design into glass, both glass and the dies had to bevery hot - just below glass melting temperature - then the glass had to cool quickly to preserve design detail. But Blue Ridge was not able to heatthe die, and the resulting experimental cents were softly detailed and had many minute surface imperfections. Blue Ridge described their process andresults in a six page report, which has been preserved among U.S. Mint documents in the National Archives.

The present 1942 glass experimental piece is the only intact example discovered in nearly 75 years since the experiments. Although glass was neverused for emergency U.S. coinage, this piece represents a unique artifact of the ingenuity and determination of Mint officials and privateindustry.

Description
Transparent yellow-amber tempered glass.
Manufactured by Blue Ridge Glass Corporation, Kingsport, TN.
Weight - 1.52 grams (approximate)
Diameter - 19.85 mm (approximate)
Thickness - 2.36 mm (approximate)

Note: The piece was made using compression molding of hot glass with cold steel dies.
Blanks ("preforms") were slightly larger and thicker than normal one-cent pieces. All pieces were manually smoothed on the edge. Thus, weight anddimensions will vary slightly from one specimen to another.

Designs are noticeably softer than on plastic or metal examples. Surfaces have irregular glass flow patterns as well as micro cracks and crazingof the surfaces as described by the Blue Ridge report of December 8, 1942.

PCGS Coin Information

Certificate # 81700131
PCGS # 12255
Date, mintmark 1942
Denomination 1C
Variety J-2069 Glass, RB 42-70
Country United States of America
Grade PR64
Holder Type PCGS Secure
Population 1