Seiko Cal. 3857 - 915

The 3857-915 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3857 caliber with 28j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-34178a7f383b]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1987

Related Models

• Seiko 7036-366
• Seiko 6643-820
• Seiko 4541-380
• Seiko 6352-362
• Seiko 4479-322
• Seiko 5237-366
• Seiko 5299-748
• Seiko 7121-863
• Seiko 6661-806
• Seiko 3811-548
• Seiko 6379-678
• Seiko 6661-896