Who made the Sexton wall hanging metal castings I found some in a box and can't seem to find any corresponding artist?

I too was curious about Sexton because of some castings I have. All I was able to find through google was at http://www.mobar.org/25a1b0c2-ee66-4fdc-9b42-e7041150546f.aspx

"On April 16, 2003, Sexton MetalCraft, Inc., a Missouri corporation, the principal office located at 9700 E. 56th Street, Raytown, MO 64133 (the "Corporation") was dissolved as of April 16, 2003 in accordance with the General and Business Corporation Law of Missouri...."

I worked for Sexton's back in the early 70's and my brother worked for them a few years before. They specialized in cast aluminum wall decor. They had their own foundry, paint booths, and warehouse area. I never met the man who designed the castings but I would seem him occassionally in the shop carrying what appeared to be a final sculpture, done in clay I believe, getting it ready to become a mold for a new product. I recall some sort of burnishing machine where he would prep the final mold. You will see some Sexton copies out there too. They never look as good as the real deal.

The man's name was Jack Dieckman and also Mr. Sexton's wife made many things for the company.