Seiko Cal. 6620 - 938

The 6620-938 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-87b1c0262534]

Also known as: Sumo, Pogue

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1985

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