Seiko Cal. 3817 - 581

Released in 1999, the Cal. 3817 with design code 581 was part of Seiko's domestic market collection. It features a Navy dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-1b32ab4301ec]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1999

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