Seiko Cal. 0761 - 644

The Seiko 0761-644 represents an important milestone in Seiko's 1966 lineup. With its 19mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-0b4bffb95952]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

18j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1966

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