Jeff, I also have a Simson that was sold by Iver-Johnson Sporting Goods. It is a petite 20ga ejector gun that is near new, probably sat in a gun cabinet most of its life. Cornell Publications has a Iver-Johnson Sporting Goods catalog that show the various grades they sold made by Somson. I my memory is correct it is from the early to mid 20s, I was able to identify my gun from the catalog.

I learn something every day, and a lot of times it's that what I learned the day before was wrong