Seiko Cal. 6690 - 435

Seiko 6690-435

This Automatic model from 1977 features a 37mm Stainless Steel case. With its 18mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-7e1c2eea113a]

Also known as: Tuna, Bellmatic

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
13.9mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Champagne
Jewels
19j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1977

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