Has anyone ever seen this?

[Richard Flanders]

That gun looks like it has more than enough drop for anyone who isn't a human-giraffe cross. Can't imagine needing that thingy at the breech...and I like more drop than most shooters. My Ithaca 1-1/2 Flues has 3" DAH and fits me just peachy. My 28" VH20 is the same and I can't seem to miss with it.

[Autumn Daze]

Fred and Dean, I am thinking Marbles. They produced/ sold many shooting aids back in the day. If you could locate one of their catalogs that may be a help.