Traditionally circular, it's made from sturdy, buoyant material, often covered in canvas, and painted in bright colors for visibility. The ring features German inscriptions, indicating its origin, and possibly instructions for use. It's a tangible relic of the harsh realities faced by sailors during the war, especially amidst the sea battles of the Atlantic.
Collectors of World War II memorabilia or naval artifacts would find this an intriguing and valuable addition to their collection, offering a unique glimpse into the lives of the German naval forces.