The Bell & Ross BR 01-97 Réserve de Marche (BR01-97-S) is a luxury wristwatch designed and manufactured by the French-Swiss watchmaker Bell & Ross, known for its exceptional craftsmanship and attention to detail, and this timepiece, in particular, is part of the brand's iconic BR 01 series, which is inspired by aircraft instruments and has become synonymous with ruggedness, durability, and accuracy.