Seiko Cal. 6636 - 275

Seiko 6636-275

This Automatic model from 1971 features a 39mm PVD Black case. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-2641583ca04f]

Also known as: Helmet, Sportsmatic

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
39mm
Case Thickness
13.6mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Black
Jewels
18j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1971

Related Models

seikata-wm-2641583ca04f