Seiko Cal. 6378 - 800

The 6378-800 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6378 caliber with 23j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-a76c06798506]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1970

Related Models

• Seiko 5237-390
• Seiko 7191-398
• Seiko 6166-967
• Seiko 0768-862
• Seiko 7066-564
• Seiko 6212-365
• Seiko 7036-649
• Seiko 6665-827
• Seiko 4478-835
• Seiko 6251-983
• Seiko 0737-313
• Seiko 7056-534