Seiko Cal. 5645 - 368

The Seiko 5645-368 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-53e2b7d0aa84]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1968

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