Seiko Cal. 6620 - 657

This Solar model from 1977 features a 45mm PVD Black case. Powered by the 6620 caliber with 32j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-59dbf4daf6e5]

Also known as: Tuna, Crown

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1977

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