A group of six brass keys for railroads in Michigan including a key for Pere Marquette stamped PM RY in serif with a tag that reads PM RY Rip Track, showing moderate tarnish on the front from foam storage. A switch key by A&W stamped PMRY. on the front an 7809 S on the back showing general pocket wear and flattening of the top of the hilt. Three switch keys for Michigan Central, two stamped in serif font and one sans serif. The sans serif shows heavy wear to the end of the barrel and pocket wear. The key with single ring is marked Bohannan and shows strong lettering. Also includes an Adlake key stamped A.A.R.R. on the front and 1076 on the back in serif, showing moderate tarnish from foam storage on the front, and flattening of the hilt. See photos for best description.