Seiko Cal. 4550 - 375

This Spring Drive model from 1988 features a 43mm Titanium case. Powered by the 4550 caliber with 24j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-e57bd24e2176]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

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