Seiko Cal. 3812 - 637

The 3812-637 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-685050a87c6d]

Also known as: Bullhead, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1977

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