Seiko Cal. 3815 - 978

The 3815-978 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3815 caliber with 21j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-05819da2763f]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1988

Related Models

• Seiko 6698-862
• Seiko 6253-359
• Seiko 5257-292
• Seiko 6680-460
• Seiko 5661-582
• Seiko 4590-721
• Seiko 6250-229
• Seiko 4574-756
• Seiko 0720-254
• Seiko 7096-745
• Seiko 3837-174
• Seiko 6182-675