Seiko Cal. 0744 - 638

The Seiko 0744-638 represents an important milestone in Seiko's 1972 lineup. Powered by the 0744 caliber with 26j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-7f00ed7ad837]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1972

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