Seiko Cal. 4550 - 420

The Seiko 4550-420 represents an important milestone in Seiko's 1995 lineup. Powered by the 4550 caliber with 31j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-c5bc91ded999]

Also known as: Tuna, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1995

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