Seiko Cal. 5644 - 435

The 5644-435 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5644 caliber with 34j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-24e1ef5dea3d]

Also known as: UFO, Crown

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1965

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