Seiko Cal. 3878 - 746

The 3878-746 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3878 caliber with 29j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-c14babf684ff]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1990

Related Models

• Seiko 6678-758
• Seiko 4459-558
• Seiko 6249-683
• Seiko 6183-583
• Seiko 3833-816
• Seiko 5280-979
• Seiko 7149-672
• Seiko 5215-648
• Seiko 5277-906
• Seiko 6624-936
• Seiko 4573-843
• Seiko 5227-374