Here is what I have, I dug it out. It is marked Schwab on the top of the release hook itself. On the side of the trigger group it is stamped Schwab Findlay O With the numbers 8 and 83 stamped on the same side. The safety has been plugged, and the unset feature has been enlarged.
It was built for a 20 GA 1100, but was never installed into the gun. I don't know if this will work, but I do want to get rid of it. Let me know. Rick Gibbs