Seiko Prospex SPB421 Divers 200m 1965 Modern Re-Interpretation US Special Edition Automatic Watch Citizen JDM Calculation of residual nitrogen in

Calculation of residual nitrogen in the body

#MW-240-7EV

Case Thickness:9

Deep Blue Dial

Seiko Prospex SPB421 Divers 200m 1965 Modern Re-Interpretation US Special Edition Automatic Watch Citizen JDM Calculation of residual nitrogen inSeiko Prospex Automatic US Special Edition Series Automatic Movement Deep Blue Dial Automatic with manual winding Precision :+25 to 15 seconds per day Power Reserve : Approx. 70 hours Sapphire Crystal Water Resistance 200m 660ft diver's 24 Jewels Caliber No: 6R35 Stop seconds hand function Date Display Stainless Steel Case Stainless Steel Strap Unidirectional rotating bezel Screw Down Crown Screw case back Three fold clasp with secure lock Anti