Seiko Cal. 4437 - 678

The 4437-678 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4437 caliber with 35j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-b136ed9d02d7]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1977

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