Seiko Cal. 3840 - 721

The Seiko 3840-721 represents an important milestone in Seiko's 1993 lineup. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-7f4ea7cb471d]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1993

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