Hi, I used to own one in 20ga (no 28ga bbls) was a nice quality gun, did have the SNST, I did have a problem with the trigger, but was fixed and no problems after that. Mine was made by Francisco Sarriugarte. The one pictured is a Zabala made gun. The engraving pattern and the fact that it's not stocked to the fences gives it away. Zabala guns as you may know are hit and miss, some good, some not so good. That includes the Derby models. Classic buy the gun not the maker.

Best of luck to you!

Greg

Gregory J. Westberg
MSG, USA
Ret