Seiko Cal. 3830 - 647

The 3830-647 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-aa2f5a701fa5]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1986

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