Seiko Cal. 6620 - 978

The 6620-978 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6620 caliber with 20j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-a53ab1ab7601]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1985

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