Sterling Plastics 542 T-Square

This 13" white plastic T-square is marked on the handle: STERLING – 542. It is also marked: MADE USA. The handle has a scale of 12 inches, divided to 1/16" and numbered by ones from 1 to 12, and a 30.5 centimeter scale, divided to millimeters, numbered by ones from 1 to 30, and marked: MM. A hole near the end of the handle permits hanging.
George and Mary Staab operated Sterling Plastics in Mountainside, New Jersey, from 1938 through the late 1960s. The firm was a division of Borden Chemical Company in the 1970s and 1980s and was purchased by Sanford Corporation in 1988. See also MA.335327, 1988.0807.01, 1990.0689.01, and 1998.3104.01. Isaac Giacinto Molella, who worked as an electrical engineer for General Electric in the United States, North Africa, and Europe in the 1950s, previously owned this T-square.
Currently not on view
date made
Sterling Plastics
place made
United States: New Jersey, Mountainside
Physical Description
plastic (overall material)
overall: 33.2 cm x 15.8 cm x .6 cm; 13 1/16 in x 6 7/32 in x 1/4 in
ID Number
accession number
catalog number
Credit Line
In Memory of Isaac Giacinto Molella
Drafting, Engineering
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Squares and Triangles
Data Source
National Museum of American History


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