Seiko Cal. 3815 - 645

The 3815-645 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-8bb0ceb70add]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1973

Related Models

• Seiko 4494-921
• Seiko 0732-892
• Seiko 7092-640
• Seiko 7175-494
• Seiko 7170-451
• Seiko 4582-664
• Seiko 4471-881
• Seiko 6634-553
• Seiko 4484-866
• Seiko 0765-233
• Seiko 7067-840
• Seiko 3893-933