Seiko Cal. 3870 - 256

This Spring Drive model from 1976 features a 46mm Stainless Steel case. Powered by the 3870 caliber with 29j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-b16d201b9616]

Also known as: Turtle, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1976

Related Models

• Seiko 7016-974
• Seiko 6144-710
• Seiko 5260-780
• Seiko 5660-599
• Seiko 6351-187
• Seiko 7168-345
• Seiko 6378-399
• Seiko 6224-462
• Seiko 5214-850
• Seiko 7192-323
• Seiko 5238-844
• Seiko 3847-682