Seiko Cal. 4437 - 139

The 4437-139 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4437 caliber with 33j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-05c78eea1e49]

Also known as: Panda, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1972

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