Seiko Cal. 6641 - 990

The 6641-990 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-ba08dae02e2d]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1984

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