Seiko Cal. 6378 - 988

The Seiko 6378-988 represents an important milestone in Seiko's 1966 lineup. It features a Navy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-541c079699ac]

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1966

Related Models

• Seiko 7037-467
• Seiko 5270-711
• Seiko 6178-906
• Seiko 7174-210
• Seiko 6336-932
• Seiko 4526-707
• Seiko 0797-562
• Seiko 4547-768
• Seiko 7035-592
• Seiko 4571-557
• Seiko 4466-745
• Seiko 6280-421