Seiko Cal. 6391 - 620

The Seiko 6391-620 represents an important milestone in Seiko's 1973 lineup. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-cd2aff3c20e4]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1973

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