Seiko Cal. 6631 - 992

The 6631-992 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-9cace9db63e1]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1976

Related Models

• Seiko 5646-116
• Seiko 6174-831
• Seiko 6622-444
• Seiko 5281-600
• Seiko 6329-158
• Seiko 7071-234
• Seiko 4473-211
• Seiko 5649-471
• Seiko 4561-317
• Seiko 7044-232
• Seiko 7024-435
• Seiko 6146-627