Seiko Cal. 3891 - 231

This Solar model from 1968 features a 46mm PVD Black case. Powered by the 3891 caliber with 17j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-fe2f7b27db00]

Also known as: Sea Horse, Flighty

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

46mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1968

Related Models

• Seiko 7154-581
• Seiko 6170-763
• Seiko 4423-275
• Seiko 7045-235
• Seiko 5658-589
• Seiko 4485-625
• Seiko 7021-430
• Seiko 6176-522
• Seiko 7156-673
• Seiko 4451-124
• Seiko 3887-661
• Seiko 5220-871