Looks like a locksmith is your only option then. Have you tried a key yet. These old switches are often worn to the point where anything that fits in the hole will turn it. I had a 55.1 panel that I used a can opener (church key) to turn the ignition.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
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