Box swivels, brass, for angling / fishing; common in 1800s to early 1900s.

Vintage Tackle Blog

Anatomy of a 100 year old tackle box

1900s Victorian Antique Mounted Fishing Reel, English, Brass

Carp Fishing Swivels Brass Barrel Swivel Terminal Tackle bass

Antique English Brass Fishing Reel Made in the Early 1900s

Anatomy of a 100 year old tackle box

1900s Victorian Antique Mounted Fishing Reel, English, Brass

Anatomy of a 100 year old tackle box

Coastal Angler Magazine, February 2023

Carp Fishing Swivels Brass Barrel Swivel Terminal Tackle bass

Brass Fishing Swivel

Fishing Ward — Yellow Perch