Seiko Cal. 7137 - 231

The Seiko 7137-231 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-a0dcf9f28cbc]

Also known as: Navigator, Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1977

Related Models

• Seiko 5239-114
• Seiko 0720-894
• Seiko 5623-337
• Seiko 5299-214
• Seiko 0796-509
• Seiko 4568-187
• Seiko 6295-185
• Seiko 3823-854
• Seiko 4523-265
• Seiko 7174-458
• Seiko 4478-842
• Seiko 4546-542