Seiko Cal. 6637 - 202

Seiko 6637-202

This Spring Drive model from 1972 features a 42mm PVD Black case. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-40846a76d032]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
42mm
Case Thickness
15.0mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Champagne
Jewels
32j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1972

Related Models

seikata-wm-40846a76d032