Seiko Cal. 6620 - 677

Released in 1993, the Cal. 6620 with design code 677 was part of Seiko's domestic market collection. Powered by the 6620 caliber with 19j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-e3d4017f4440]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

19j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1993

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