Seiko Cal. 5631 - 805

This Spring Drive model from 1978 features a 41mm Titanium case. It features a Green dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-4a45cc670901]

Also known as: Sea Horse, Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

34j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1978

Related Models

• Seiko 5622-308
• Seiko 6195-582
• Seiko 3834-852
• Seiko 6358-302
• Seiko 4454-383
• Seiko 3880-954
• Seiko 5215-963
• Seiko 6148-672
• Seiko 0777-306
• Seiko 6213-788
• Seiko 6123-429
• Seiko 6190-724