Seiko Cal. 3840 - 957

The 3840-957 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3840 caliber with 31j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-81eb1875e048]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1969

Related Models

• Seiko 6114-600
• Seiko 6384-120
• Seiko 5266-416
• Seiko 6143-172
• Seiko 0748-519
• Seiko 3813-507
• Seiko 7033-987
• Seiko 4572-519
• Seiko 4479-719
• Seiko 5219-989
• Seiko 6248-662
• Seiko 6112-325