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The Basic J-37

The basic J-37 key is a marvel of simplicity. In these pictures you can see the entire structure of the key. The leaf spring, which is positioned under the right binding post, provides the "ground" connection to the lever. The metal strip running from the left binding post to the anvil is the "hot" side of the connection. In the picture below you can see the "J-37" molded into the frame.

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The bottom of this key has an orange Signal Corps acceptance stamp. You can also see the three mounting holes that are molded into the frame.

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This unusual J-37 "look alike" has the words "Soling" and "Japan" molded into the bottom.


The Soling, Japan, J-37 does NOT have "J-37" molded into the top of the frame. Other than having slightly smaller binding post nuts, the Japanese copy looks identical to the U. S. J-37 shown with it here.

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The Soling actually makes no claim to be a J-37, since there are no number designations on either the key frame or the box.


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