Seiko Cal. 6661 - 544

The Seiko 6661-544 represents an important milestone in Seiko's 1975 lineup. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-a07f39ced68a]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1975

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