Seiko Cal. 3899 - 487

The 3899-487 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3899 caliber with 20j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-88987206650b]

Also known as: Navigator, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1981

Related Models

• Seiko 6185-599
• Seiko 6211-315
• Seiko 5640-310
• Seiko 4447-855
• Seiko 0795-533
• Seiko 3815-854
• Seiko 4490-492
• Seiko 6383-327
• Seiko 0778-231
• Seiko 4490-615
• Seiko 7134-775
• Seiko 7054-826