Seiko Cal. 6370 - 820

Released in 1965, the Cal. 6370 with design code 820 was part of Seiko's domestic market collection. Powered by the 6370 caliber with 17j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-e0acc78d9a4a]

Also known as: Sumo, UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1965

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