Seiko Cal. 5646 - 853

This Spring Drive model from 1981 features a 34mm Titanium case. Powered by the 5646 caliber with 29j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-3a08ae2b6b33]

Also known as: Turtle, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Silver

Jewels

29j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1981

Related Models

• Seiko 3838-661
• Seiko 4425-552
• Seiko 6635-142
• Seiko 5216-484
• Seiko 6632-151
• Seiko 3816-953
• Seiko 5267-475
• Seiko 5290-174
• Seiko 5643-605
• Seiko 5613-738
• Seiko 4577-681
• Seiko 4515-581