Seiko Cal. 5640 - 216

This Hand-Winding model from 1976 features a 38mm PVD Black case. It features a White dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-5f45d157ac4c]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1976

Related Models

• Seiko 6344-737
• Seiko 5293-110
• Seiko 3831-756
• Seiko 5677-225
• Seiko 6380-902
• Seiko 4498-163
• Seiko 3868-908
• Seiko 4597-992
• Seiko 3880-465
• Seiko 6236-292
• Seiko 5673-623
• Seiko 4593-117