Seiko Cal. 3840 - 439

The Seiko 3840-439 represents an important milestone in Seiko's 1976 lineup. Powered by the 3840 caliber with 25j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-f5a7cb5ffefb]

Also known as: Tuna, Silverwave

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

34mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1976

Related Models

• Seiko 5284-724
• Seiko 5616-815
• Seiko 5673-989
• Seiko 0777-628
• Seiko 7093-348
• Seiko 7138-168
• Seiko 6138-961
• Seiko 0774-325
• Seiko 0744-526
• Seiko 3883-806
• Seiko 5288-482
• Seiko 4543-807