Seiko Cal. 4437 - 183

The 4437-183 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-63cd4af999d5]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1989

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