This is a quality 316L stainless steel watch case with screw down crown and a screw down case back cover. Crown and a case cover are rubber sealed. Fits TY2846 movement

 

SPECIFICATIONS:

 

Crystal - Mineral

Water resistance: 5 ATM

Diameter: 43.5mm 

Case thickness: 15mm including a crystal

Width between lugs: 23mm

Bezel diameter: 42mm

Case inside diameter: 34.5 mm

Diameter of internal shoulder (visible dial): 33 mm

Case internal height from internal shoulder to the edge: 7 mm

Height between internal shoulder to crystal: 2.5 mm

Height between internal shoulder and stem hole center : 3.2 mm

Crown diameter: 7 mm