One is brass. The brass one has less rust on it. The both work.
2 Vintage Brass Fish Stringer Mill Run 9 Hooks
vintage BRASS HAUSER FISH STRINGER
Rapala Metal Stringer Black/Brass : Sports & Outdoors
Vintage 1950s and 1960s Fishing Gear - sporting goods - by owner
Ozark Trail 9-Snap Chain Stringer - 40
Mill Run Brass Fish Fishing Stringer
Catalogue - Palm Beach Jewelry, Art & Antique Show
Vintage Rustic Metal Chain Fish Stringer Holder 9 Hooks Old
Rapala Metal Stringer Black/Brass : Sports & Outdoors
Old brass Mill Run fish stringer,Vintage fishing item
Rapala Metal Stringer Black/Brass : Sports & Outdoors
, I believe this piece is a combination of copper and brass. It features 9 hook clips, each branded with Mill Run, Cleve. O. All clips are in
Vintage Brass or Copper Mill Run Fish Stringer - Cleveland Ohio
Vintage Fish Stringer Upcycle and Repurpose Fish Chain Vintage
Vintage Fish Stringers- Sold as Set of 2 - sporting goods - by