Seiko Cal. 6642 - 494

This Spring Drive model from 1979 features a 36mm Two-Tone case. It features a Navy dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-13a96419c77d]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1979

Related Models

• Seiko 5672-506
• Seiko 6248-587
• Seiko 5225-757
• Seiko 7142-703
• Seiko 6612-691
• Seiko 7053-605
• Seiko 7173-487
• Seiko 7115-361
• Seiko 5692-652
• Seiko 5679-492
• Seiko 4472-947
• Seiko 6268-268