Seiko Cal. 5644 - 121

The 5644-121 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5644 caliber with 31j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-fa4f67e06a48]

Also known as: Bellmatic, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

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