Seiko Cal. 6636 - 963

The Seiko 6636-963 represents an important milestone in Seiko's 1976 lineup. With its 21mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-0fefef77a0bf]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1976

Related Models

• Seiko 5222-830
• Seiko 3899-511
• Seiko 5633-724
• Seiko 6341-380
• Seiko 6646-939
• Seiko 4428-151
• Seiko 4442-906
• Seiko 4563-732
• Seiko 6111-747
• Seiko 6211-388
• Seiko 7193-233
• Seiko 6156-853