Seiko Cal. 4550 - 525

This Spring Drive model from 1991 features a 35mm PVD Black case. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-a1e6fcaba684]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1991

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