Seiko Cal. 6137 - 443

The 6137-443 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6137 caliber with 21j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-097d498af99d]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1971

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