Seiko Cal. 5257 - 148

The Seiko 5257-148 represents an important milestone in Seiko's 1974 lineup. Powered by the 5257 caliber with 20j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-5bab99315ddf]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1974

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