Seiko Cal. 6656 - 721

The Seiko 6656-721 represents an important milestone in Seiko's 1968 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-5d2368739b5c]

Also known as: Tuna, Arnie

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1968

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