Automatic Movement: "POWERMATIC 80" confirms it's an automatic watch with an 80-hour power reserve, worn by wrist movement .
· See-Through Case Back: "SAPPHIRE CRYSTAL" indicates a transparent back, allowing you to see the movement inside, while keeping it scratch-resistant .
· Water Resistance: "10bar / 100m / 330ft" means it's suitable for swimming and snorkeling, but not for deep diving.
· Materials & Sizing: "STAINLESS STEEL" with "316L" refers to the steel case, and "T137407A" is a specific model reference number for the 40mm automatic version.