Seiko Cal. 6391 - 316

The Seiko 6391-316 represents an important milestone in Seiko's 1971 lineup. Powered by the 6391 caliber with 30j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-70162fa8a49b]

Also known as: Crown, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

30j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1971

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