Seiko Cal. 6644 - 536

This Solar model from 1973 features a 40mm Hardlex-Coated Steel case. It features a Black dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-06a5c13e6c6e]

Also known as: UFO, Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1973

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