Seiko Cal. 3813 - 947

The Seiko 3813-947 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-26ed8398d3bb]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1965

Related Models

• Seiko 6670-969
• Seiko 0740-120
• Seiko 7162-957
• Seiko 7085-424
• Seiko 6652-823
• Seiko 7138-195
• Seiko 5218-347
• Seiko 4444-431
• Seiko 4544-701
• Seiko 6184-399
• Seiko 0777-112
• Seiko 6622-960