Seiko Cal. 6643 - 710

This Hand-Winding model from 1996 features a 36mm Titanium case. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-a7103d916112]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1996

Related Models

• Seiko 6170-640
• Seiko 7114-948
• Seiko 4425-888
• Seiko 7097-392
• Seiko 4473-458
• Seiko 6159-439
• Seiko 5681-107
• Seiko 5673-111
• Seiko 4537-393
• Seiko 3895-197
• Seiko 7042-248
• Seiko 3862-312