Seiko Cal. 4550 - 171

This Spring Drive model from 1971 features a 36mm PVD Black case. Powered by the 4550 caliber with 25j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-960b7ab20de9]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1971

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