Seiko Cal. 6391 - 721

The 6391-721 is a sought-after Spring Drive piece from Seiko's golden era. It features a Cream dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-5609b2df92c1]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1983

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