Seiko Cal. 6641 - 306

This Hand-Winding model from 1980 features a 37mm Two-Tone case. It features a Navy dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-1dcbaecf0e79]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1980

Related Models

• Seiko 4416-422
• Seiko 6237-492
• Seiko 4514-856
• Seiko 6367-132
• Seiko 6634-817
• Seiko 5667-931
• Seiko 7143-555
• Seiko 7068-593
• Seiko 7051-128
• Seiko 0762-528
• Seiko 5658-413
• Seiko 7196-992