A round blackened metal fly box with a removable lid and interior rotating fly wheel insert.
The box is circular and made of steel, now showing heavy rust and pitting from age.
A small brass identification plate is fixed to the top lid, engraved with the Winchester patent mark and date.
Inside, a black fly wheel disk with four large circular openings and slotted edges is designed to hold individual fishing flies or leaders.
An arrow indicator marks rotation direction.
The side of the box includes a small cutout opening, likely for ventilation or drainage