This photograph shows someone incorrectly measuring a yard of cloth by using their arm as measurement. This is from the Department of Public Safety's Division of Weights and Measures.
This is a photograph of a Correct measure cloth measuring device, which also computes the price. This is from the Department of Public Safety's Division of Weights and Measures.
This is an image of confiscated scales and one of the scales does have "Not legal For Use in Trade" on the scale. From the Department of Public Safety's Division of Weights and Measures.