Seiko Cal. 0737 - 644

The Seiko 0737-644 represents an important milestone in Seiko's 1972 lineup. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-d5e7edfb81cd]

Also known as: Bellmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1972

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