THB Sandus Hollow Series 2025 Debut .Parameters synchronized with genuine products .Case diameter: 39.8 mm .Movement: Swiss Ronda 4S modified mechanical movement .Case thickness: 9.08 mm .Dial color: Hollow .Dial shape: Square .SKU color: Silver .Watch: Features imported fluororubber quick release lugs .Buckle: Utilizes Cartier s latest folding clasp .Case back: Transparent .Crystal: Sapphire crystal .Hands: Blue heat treated steel hands, luminous version uses imported green luminescent material .Crown: Gem set crown