Seiko Cal. 5621 - 663

The 5621-663 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-016d52546aeb]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1985

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