Seiko Cal. 4437 - 907

The 4437-907 is a sought-after Hand-Winding piece from Seiko's golden era. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e4e9b16b83a6]

Also known as: UFO, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1985

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