Seiko Cal. 3820 - 377

The Seiko 3820-377 represents an important milestone in Seiko's 1970 lineup. Powered by the 3820 caliber with 22j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-a6f5928552ce]

Also known as: Tuna, Goldfeather

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1970

Related Models

• Seiko 6181-138
• Seiko 4425-793
• Seiko 0728-520
• Seiko 5684-551
• Seiko 6288-310
• Seiko 7125-673
• Seiko 5295-568
• Seiko 3821-975
• Seiko 6234-370
• Seiko 6368-453
• Seiko 7048-699
• Seiko 5667-470