Seiko Cal. 4487 - 270

This Spring Drive model from 1995 features a 38mm PVD Black case. Powered by the 4487 caliber with 20j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-bc533983f8ab]

Also known as: Monster, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1995

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