Seiko Cal. 5637 - 691

Seiko 5637-691

This Spring Drive model from 1992 features a 45mm Hardlex-Coated Steel case. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-49037d5eac18]

Also known as: Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
8.6mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
180m
Dial Color
Silver
Jewels
20j
Frequency
36,000 bph
Power Reserve
69 hours
Year
1992

Related Models

seikata-wm-49037d5eac18