Seiko Cal. 5645 - 101

The Seiko 5645-101 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-5c98ec9c831a]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1973

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