CLARKSTAN
record player needle pressure gauge

This is a needle pressure gauge for a record player also called a pickup. It is a simple device made by Pacific Transducer Corporation from Los Angeles in the U.S.A.. Formerly the company was called Clarkstan Corporation. It is a spring steel leaf spring with two aluminum cups on it in which the needle point of the record player can be placed. The outer scale in grams goes up to 28 grams, the inner scale in ounces goes up to 4 ounces! I don't know from which period this pressure gauge dates. Today's record players have a needle pressure between 1 and 3 grams. The range of this pressure gauge therefore seems strangely large. Perhaps this Clarkstan was made for older (78 rpm) record players that may have required a greater pressure? In England the Garrard pressure gauge was made in the 1950s-1960s, the prescribed maximum pressure had to remain below 10 grams.
Below are some more images of the Clarkstan needle pressure scale.