Seiko Cal. 4437 - 178

The Seiko 4437-178 represents an important milestone in Seiko's 1990 lineup. Powered by the 4437 caliber with 20j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-20014ca91b10]

Also known as: Rally, Silverwave

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1990

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