Seiko Cal. 6157 - 637

The 6157-637 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6157 caliber with 31j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-290c75fde51f]

Also known as: Crown, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1986

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