Seiko Cal. 5644 - 748

The Seiko 5644-748 represents an important milestone in Seiko's 1971 lineup. Powered by the 5644 caliber with 20j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-ee188b997347]

Also known as: Panda, Bullhead

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1971

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