Telemecanique Industrial Control System Made in France, vintage switch knob (top part only) We sincerely apologize, but this is a specialized product. Please examine the photos carefully and only purchase if you understand the product and have electrical knowledge. This switch was originally used in my family's factory. Its shape and functionality were so good that I kept it in storage for many years without using it. Recently, I had the parts cleaned in preparation for use. I am listing the extra switches. I am not particularly knowledgeable about this product, so I may not be able to answer specialized questions. However, the cleaning process did result in some fading of the lettering, which was accepted. I believe the operation is not a problem. However, as this is a very old product, it is not perfect like new. Please purchase only if you have electrical knowledge and understand that this is a used item. There are dullness, scratches, etc. If you are purchasing multiple items, please comment before purchasing. Thank you.