Seiko Cal. 6391 - 439

The 6391-439 is a sought-after Hand-Winding piece from Seiko's golden era. It features a White dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-f9857482b62d]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1990

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