Seiko Cal. 4427 - 237

This Solar model from 1985 features a 40mm Hardlex-Coated Steel case. Powered by the 4427 caliber with 36j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-7c9daa9e09d7]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1985

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