This is a hinge pressure fit pin that will fit the arm on an Omega Speedmaster clasp stamped STZ004194. This is a high quality compatible part that can be used to replace a broken or worn out hinge.
This part can be used to fix your broken clasp and save you money having to buy a new clasp.
If you are not sure if this will fit your watch or if you have any other questions then message me. I'm here to help you.