I’m attempting to identify this chair so that I can order some replacement parts. I’ve had this chair for a long time maybe 15 – 20 years maybe more. I replaced a couple of parts about 10 years ago. The only identifying mark I can find is the tag in the photo below. As you can see the manufacture is Office Master, Inc. I’ve visited their web site and the do have replacement arms. I need help identifying the arms that will fit this chair.

The failing component is the rotary button used for raising and lowering the arm rest shown in the photo below. I think I will need to replace the entire arm rest.

Here is a photo that might help identify the model of the chair.








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