Seiko Cal. 3887 - 706

The 3887-706 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3887 caliber with 17j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-cd04684cc684]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1967

Related Models

• Seiko 6316-165
• Seiko 6335-244
• Seiko 6234-832
• Seiko 6180-677
• Seiko 5649-604
• Seiko 3889-248
• Seiko 7153-154
• Seiko 4473-590
• Seiko 0784-558
• Seiko 0799-116
• Seiko 4523-476
• Seiko 5289-216