Seiko Cal. 6660 - 441

The Seiko 6660-441 represents an important milestone in Seiko's 1968 lineup. It features a Cream dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-08282cfd68a0]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1968

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