Seiko Cal. 6648 - 538

Seiko 6648-538

The Seiko 6648-538 represents an important milestone in Seiko's 1975 lineup. Powered by the 6648 caliber with 30j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-2aa15708ce15]

Also known as: Bellmatic

Specifications

Movement
Solar
Case Material
Titanium
Case Width
39mm
Case Thickness
15.7mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Black
Jewels
30j
Frequency
28,800 bph
Power Reserve
47 hours
Year
1975

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