Seiko Cal. 3857 - 257

The Seiko 3857-257 represents an important milestone in Seiko's 1976 lineup. Powered by the 3857 caliber with 21j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-dd61753fdf7c]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1976

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