Seiko Cal. 6321 - 660

The 6321-660 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-a56d15bfde84]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1998

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