Seiko Cal. 6644 - 336

The Seiko 6644-336 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-59ad0c09e8f3]

Also known as: Bellmatic, World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1970

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