Seiko Cal. 4581 - 910

This Spring Drive model from 1987 features a 41mm PVD Black case. Powered by the 4581 caliber with 21j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-a0377287ef0e]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1987

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