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