Seiko Cal. 6391 - 765

This Solar model from 1970 features a 39mm Two-Tone case. Powered by the 6391 caliber with 18j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-a0a20639a1aa]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1970

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