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

Barrel Swivels Brass or Black Finish - Barlow's Tackle

Carp Fishing Swivels Brass Barrel Swivel Terminal Tackle bass

19th Century Fishing Line - Fin & Flame

Coastal Angler Magazine, February 2023

1900s Victorian Antique Mounted Fishing Reel, English, Brass

Anatomy of a 100 year old tackle box

Standard barrel swivel made in Korea with brass finish.

Barrel Swivels-1912i

Vintage Tackle Blog

Coastal Angler Magazine, August 2023

Reliable: T-Turn 3 way swivels are made out of premium brass, not easy to rust, smooth and reliable, red beads can attract fishes Rotation: This

3 Way T-Turn Barrel Swivels Fishing Tackle,40pcs Brass Barrel Triple Swivel Cross Line 3 Way Barrel Fishing Connector with Red Fishing Beads for

Carp Fishing Swivels Brass Barrel Swivel Terminal Tackle bass