Seiko Cal. 5257 - 644

The Seiko 5257-644 represents an important milestone in Seiko's 1980 lineup. Powered by the 5257 caliber with 19j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-a55bfba9dc69]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1980

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