Seiko Cal. 6647 - 426

The 6647-426 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6647 caliber with 18j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-1fe7bc375eb3]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1973

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