Seiko Cal. 6379 - 640

This Solar model from 1978 features a 39mm Two-Tone case. Powered by the 6379 caliber with 36j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-90a482252036]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1978

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