Seiko Cal. 3857 - 498

The Seiko 3857-498 represents an important milestone in Seiko's 1977 lineup. It features a Black dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-530c15029401]

Also known as: Monster, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1977

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