Seiko Cal. 6620 - 870

Released in 1971, the Cal. 6620 with design code 870 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-7c1bbef54abb]

Also known as: Monster, Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1971

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