Seiko Cal. 3840 - 778

The 3840-778 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-f9ba1915225b]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1977

Related Models

• Seiko 6698-997
• Seiko 6211-894
• Seiko 6291-594
• Seiko 7187-395
• Seiko 7025-197
• Seiko 7024-485
• Seiko 6612-797
• Seiko 6365-185
• Seiko 6655-892
• Seiko 5296-800
• Seiko 6362-590
• Seiko 7078-925