Seiko Cal. 5621 - 311

The Seiko 5621-311 represents an important milestone in Seiko's 1971 lineup. It features a White dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-d165f33e9670]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1971

Related Models

• Seiko 4536-180
• Seiko 6316-871
• Seiko 6615-199
• Seiko 6670-198
• Seiko 7168-124
• Seiko 4490-600
• Seiko 6240-233
• Seiko 7112-493
• Seiko 5250-209
• Seiko 5689-417
• Seiko 5628-432
• Seiko 4483-131