Seiko Cal. 3891 - 680

This Hand-Winding model from 1966 features a 36mm Gold-Plated case. Powered by the 3891 caliber with 29j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-db089551c026]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1966

Related Models

• Seiko 6152-694
• Seiko 7145-343
• Seiko 5665-765
• Seiko 7055-582
• Seiko 4460-351
• Seiko 6313-230
• Seiko 6214-231
• Seiko 4537-785
• Seiko 6175-164
• Seiko 4459-739
• Seiko 6181-298
• Seiko 0723-574