Seiko Cal. 6390 - 506

This Spring Drive model from 1971 features a 40mm Stainless Steel case. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-29de75ad2a8e]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1971

Related Models

• Seiko 4453-427
• Seiko 3855-633
• Seiko 4455-882
• Seiko 3878-697
• Seiko 5663-543
• Seiko 3885-898
• Seiko 5299-327
• Seiko 5616-549
• Seiko 6624-852
• Seiko 6653-469
• Seiko 6654-293
• Seiko 4443-783