Seiko Cal. 5644 - 140

This Quartz model from 1971 features a 38mm Titanium case. With its 20mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-cfd4050a9bd3]

Also known as: Turtle, UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1971

Related Models

• Seiko 0793-752
• Seiko 5215-169
• Seiko 5264-689
• Seiko 6199-840
• Seiko 5277-231
• Seiko 6214-651
• Seiko 6254-673
• Seiko 5210-849
• Seiko 5699-433
• Seiko 6182-293
• Seiko 6284-117
• Seiko 6368-523