Seiko Cal. 6156 - 157

The 6156-157 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6156 caliber with 30j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-574cb44699cd]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1979

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