Seiko Cal. 6631 - 289

Seiko 6631-289

The 6631-289 is a sought-after Automatic piece from Seiko's golden era. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-9389419388a0]

Also known as: Bullhead

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
44mm
Case Thickness
9.0mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
20j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1969

Related Models

seikata-wm-9389419388a0