Seiko Cal. 4427 - 712

The Seiko 4427-712 represents an important milestone in Seiko's 1975 lineup. Powered by the 4427 caliber with 35j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-3886c2bcb250]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1975

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