Seiko Cal. 5637 - 635

This Spring Drive model from 1976 features a 36mm PVD Black case. It features a Champagne dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-bef116af4445]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

25j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1976

Related Models

• Seiko 6125-138
• Seiko 3891-395
• Seiko 5284-734
• Seiko 3847-770
• Seiko 7075-685
• Seiko 7112-936
• Seiko 5611-626
• Seiko 3840-411
• Seiko 3832-232
• Seiko 0771-736
• Seiko 4511-129
• Seiko 4473-694