Seiko Cal. 6631 - 348

Seiko 6631-348

The Seiko 6631-348 represents an important milestone in Seiko's 1997 lineup. Powered by the 6631 caliber with 30j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-f05f1d1ae841]

Also known as: Monster, Rally

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
37mm
Case Thickness
14.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
150m
Dial Color
White
Jewels
30j
Frequency
21,600 bph
Power Reserve
71 hours
Year
1997

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