Seiko Cal. 6391 - 723

Released in 1966, the Cal. 6391 with design code 723 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-947954bc61bb]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1966

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