Seiko Cal. 5638 - 680

This Hand-Winding model from 1988 features a 39mm Hardlex-Coated Steel case. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-dd8521161303]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1988

Related Models

• Seiko 6264-351
• Seiko 3855-530
• Seiko 6150-209
• Seiko 4452-328
• Seiko 5219-169
• Seiko 4584-663
• Seiko 6261-139
• Seiko 6332-610
• Seiko 6348-664
• Seiko 5281-434
• Seiko 6298-545
• Seiko 6630-691