Seiko Cal. 6391 - 548

The Seiko 6391-548 represents an important milestone in Seiko's 1972 lineup. It features a White dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-6b752c3a99bb]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1972

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