Seiko Cal. 3831 - 634

The Seiko 3831-634 represents an important milestone in Seiko's 1980 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-89ea4a53be0e]

Also known as: Turtle, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1980

Related Models

• Seiko 5243-286
• Seiko 5634-672
• Seiko 7158-901
• Seiko 6134-699
• Seiko 7134-274
• Seiko 6299-535
• Seiko 6363-227
• Seiko 7132-815
• Seiko 3824-450
• Seiko 5631-794
• Seiko 5667-159
• Seiko 4449-985