Seiko Cal. 6390 - 556

This Solar model from 1965 features a 37mm Two-Tone case. Powered by the 6390 caliber with 25j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-76482c6af461]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1965

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