Seiko Cal. 5681 - 101

This Hand-Winding model from 1966 features a 37mm Hardlex-Coated Steel case. With its 22mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-fa2da2b029b9]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1966

Related Models

• Seiko 5274-606
• Seiko 4452-269
• Seiko 4512-100
• Seiko 7045-898
• Seiko 3812-478
• Seiko 6284-533
• Seiko 6378-485
• Seiko 6334-311
• Seiko 6237-357
• Seiko 4522-682
• Seiko 6229-918
• Seiko 0742-813