Seiko Cal. 5648 - 337

Seiko 5648-337

The Seiko 5648-337 represents an important milestone in Seiko's 1979 lineup. Powered by the 5648 caliber with 30j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-3f219d2983d3]

Also known as: Monster, Sumo

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
11.9mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Black
Jewels
30j
Frequency
36,000 bph
Power Reserve
61 hours
Year
1979

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