Seiko Cal. 0721 - 311

This Spring Drive model from 1985 features a 46mm Hardlex-Coated Steel case. It features a Black dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-84dcab4fc87f]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1985

Related Models

• Seiko 7036-740
• Seiko 6341-215
• Seiko 3840-310
• Seiko 7030-602
• Seiko 6693-495
• Seiko 7153-934
• Seiko 6638-476
• Seiko 6129-382
• Seiko 6683-310
• Seiko 6185-853
• Seiko 4553-384
• Seiko 3894-684