Seiko Cal. 5641 - 170

This Spring Drive model from 1991 features a 39mm Hardlex-Coated Steel case. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-52c7bf8ba974]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1991

Related Models

• Seiko 6672-581
• Seiko 6381-127
• Seiko 4531-798
• Seiko 6141-141
• Seiko 6150-931
• Seiko 6231-780
• Seiko 0783-795
• Seiko 6167-838
• Seiko 5631-321
• Seiko 4482-475
• Seiko 4441-615
• Seiko 6685-638