Seiko Cal. 6631 - 693

Seiko 6631-693

The 6631-693 is a sought-after Kinetic piece from Seiko's golden era. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-d7eb75442044]

Also known as: Helmet

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
44mm
Case Thickness
12.4mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Silver
Jewels
35j
Frequency
28,800 bph
Power Reserve
63 hours
Year
1968

Related Models

seikata-wm-d7eb75442044