Seiko Cal. 6387 - 771

This Spring Drive model from 1969 features a 42mm Gold-Plated case. Powered by the 6387 caliber with 33j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-277d2347b0ea]

Also known as: Samurai, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1969

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