Seiko Cal. 6631 - 245

Released in 1979, the Cal. 6631 with design code 245 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-fc5532ca968e]

Also known as: Sea Horse

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1979

Related Models

• Seiko 7087-219
• Seiko 5692-132
• Seiko 7082-992
• Seiko 3873-766
• Seiko 7124-168
• Seiko 6617-914
• Seiko 5687-761
• Seiko 4534-932
• Seiko 7153-229
• Seiko 5626-841
• Seiko 6380-476
• Seiko 4433-515