Seiko Cal. 6651 - 421

This Quartz model from 1978 features a 40mm Two-Tone case. Powered by the 6651 caliber with 30j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-2eb02bed0792]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1978

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