Seiko Cal. 0731 - 437

The 0731-437 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-765d4cd9baf2]

Also known as: Sportsmatic, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1967

Related Models

• Seiko 6679-894
• Seiko 5254-983
• Seiko 0725-674
• Seiko 5280-140
• Seiko 6375-202
• Seiko 4450-612
• Seiko 3858-210
• Seiko 3884-905
• Seiko 6179-792
• Seiko 6397-316
• Seiko 3812-175
• Seiko 7014-519