Seiko Cal. 5644 - 361

The 5644-361 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5644 caliber with 18j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-ed7d1bc03cd9]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

50m

Dial Color

White

Jewels

18j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1975

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