Seiko Cal. 6661 - 640

This Hand-Winding model from 1975 features a 45mm Two-Tone case. It features a Burgundy dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-af902d51d811]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1975

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