Seiko Cal. 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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