Seiko Cal. 5637 - 831

This Automatic model from 1970 features a 45mm Gold-Plated case. It features a White dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-ddd2f720fc52]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1970

Related Models

• Seiko 7186-776
• Seiko 6136-580
• Seiko 0743-733
• Seiko 5249-136
• Seiko 5674-483
• Seiko 4590-668
• Seiko 6289-736
• Seiko 6170-741
• Seiko 3883-242
• Seiko 0757-528
• Seiko 0767-420
• Seiko 0725-112