Seiko Cal. 3828 - 657

The Seiko 3828-657 represents an important milestone in Seiko's 1971 lineup. Powered by the 3828 caliber with 20j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-623afbf54f5d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1971

Related Models

• Seiko 4545-317
• Seiko 0771-455
• Seiko 3882-777
• Seiko 5677-844
• Seiko 7028-759
• Seiko 4572-384
• Seiko 4455-704
• Seiko 6153-581
• Seiko 6243-242
• Seiko 4539-797
• Seiko 6687-506
• Seiko 6169-314