Seiko 5 SPRD57 Automatic jazzmaster or the newest addition

or the newest addition

Case size 46mm

31 micro gas tubes on bezel

Chronograph measures up to 30 minutes of elapsed time in 1/8-second increments

Additional Functions:

Seiko 5 SPRD57 Automatic jazzmaster or the newest additionCaliber Number 4R36 Movement Type Automatic with manual winding capacity Accuracy +45 to 35 seconds per day Duration Approx. 41 hours Case Material Stainless steel Crystal Hardlex LumiBrite Lumibrite on hands and indexs Clasp Three fold clasp with secure lock ,push button release Water Resistance 10 bar Case Size Thickness: 13. 4 Diameter: 42. 5 Length: 46 Other Specifications Screw case back See through case back Unidirectional rotating bezel 24