This is from "American Military Button Makers and Dealers; Their Backmarks and Dates" by William F. Mcguinn and Bruce Bazelon.
Steele & Johnson, Waterbury, CT. Comprised of Elisha Steele & Joseph G. Johnson. Organized in 1852 to manufacture gilt and plated metal buttons. Sold to Waterbury Jewelry Co. in 1856 but reorganized on March 17, 1858 as Steele & Johnson Button Co. In 1875 it became Steele & Johnson Mfg. Co. & lasted to c. 1920.
I also found this in the same book and it gets a little confusing. They have a GI 94 listed with a Steele and Johnson Mfg. Co. backmark. The GI94 is the early version dating back as far as 1854. The GI94 refers to the button number in Albert's button book. And, indeed it is listed in Albert's. But, they also list a GI88A with the same backmark and it is pre 1854. But, Albert's does not show the Steele and Johnson Mfg. Co. backmark in the listing for GI88A. Instead it shows a "&Steele & Johnson".I hope someone can explain this to us. How does a 1875-1920 backmark show up on an 1854 button? Was there a huge surplus of button fronts that eventually were put into service with the newer back? How long was the first version produced before they changed to the raised shield?
OK, my head hurts now. Y'all think about it, I'm outta here!