Seiko Cal. 3879 - 997

The 3879-997 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3879 caliber with 17j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-d44d42221949]

Also known as: Turtle, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1975

Related Models

• Seiko 6154-479
• Seiko 6139-807
• Seiko 7128-365
• Seiko 6666-410
• Seiko 6641-178
• Seiko 5639-386
• Seiko 5696-798
• Seiko 7035-919
• Seiko 4582-370
• Seiko 6691-574
• Seiko 6185-521
• Seiko 6326-332