Seiko Cal. 6678 - 431

The 6678-431 is a sought-after Solar piece from Seiko's golden era. Powered by the 6678 caliber with 17j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-79ff2b08990a]

Also known as: UFO, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1975

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