Seiko Cal. 6645 - 778

Released in 1993, the Cal. 6645 with design code 778 was part of Seiko's domestic market collection. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-fe2aff8ed90c]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1993

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