Seiko Cal. 6644 - 451

This Hand-Winding model from 1968 features a 36mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-59acd18c11b8]

Also known as: UFO, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1968

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