The Spinnaker Fleuss 40 Automatic is a vintage-inspired diver that draws aesthetic cues from the functional timepieces of the 1950s. This "Sunset Amber" edition features a gradient dial that transitions from a deep orange center to dark edges, finished with a textured surface for reduced glare. The watch is equipped with a unidirectional bezel featuring a luminescent acrylic insert, providing a classic "bakelite" look while maintaining modern scratch resistance.

Constructed for a balanced fit on a variety of wrist sizes, the Fleuss 40 features a 40mm stainless steel case with a thickness of 13mm. The 48mm lug-to-lug distance ensures the watch sits securely without excessive overhang, while the 20mm stainless steel bracelet provides a durable and integrated feel. The case is finished with a mix of brushed and polished surfaces and includes a screw-down crown to maintain its water resistance rating.

The watch is powered by the Seiko NH35 automatic movement, a Japanese caliber known for its reliability and 41-hour power reserve. The dial is protected by a scratch-resistant sapphire lens and features applied indices treated with Swiss Super-LumiNova for legibility in low-light conditions. With a 150-meter water resistance rating and an exhibition caseback that reveals the mechanical movement, the Fleuss 40 is engineered for both daily wear and recreational aquatic use.