Seiko Cal. 6378 - 528

The Seiko 6378-528 represents an important milestone in Seiko's 1974 lineup. It features a Navy dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-4510c321acae]

Also known as: Sumo, Crown

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1974

Related Models

• Seiko 4578-252
• Seiko 4573-761
• Seiko 6340-447
• Seiko 6216-298
• Seiko 6336-436
• Seiko 6218-324
• Seiko 5279-794
• Seiko 3890-849
• Seiko 7112-303
• Seiko 4433-559
• Seiko 6281-319
• Seiko 6389-918