waterproof hollow automatic mechanical watches

Movement: mechanical movement hollow
Crystal: sapphire crystal plated
Strap Material: 316L stainless steel 
Case Material: 316L stainless steel
Dial Color: black, white
Dial thickness: 11MM
Case diameter: 42MM
Display: Pointer (luminous)
Water depth: 50M water depth
Clasp: stainless steel clasp