This Panerai Luminor 1950 3 Days Power Reserve, model PAM00422, is crafted in stainless steel and is fitted to an Assolutamente calfskin leather strap with a large size brushed steel ardillon buckle, supplied with an interchangeable strap and a steel screwdriver. The watch features a black dial, sub seconds, and luminescent hands and markers. The case measures 47mm, fitted with a steel trademarked lever device which protects the winding crown. The Panerai Luminor 1950 3 Days Power Reserve has a 2mm thick sapphire crystal on top, a see-through sapphire crystal case back which displays a power reserve indicator, anti-reflective coating, and a Panerai "Manufacture" P.3001 calibre movement. Water Resistant to 10 Bar / 100 meters.