Seiko Cal. 5644 - 321

The Seiko 5644-321 represents an important milestone in Seiko's 1975 lineup. Powered by the 5644 caliber with 33j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-013ca1a52222]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1975

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