Seiko Cal. 3891 - 638

The 3891-638 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-e920e59c4acb]

Also known as: UFO, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1990

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