Seiko Cal. 6390 - 337

The Seiko 6390-337 represents an important milestone in Seiko's 1968 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-d03d0de1c223]

Also known as: Tuna, Bellmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1968

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