Seiko Cal. 6378 - 506

Seiko 6378-506

The 6378-506 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6378 caliber with 20j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-0d76b9856302]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
41mm
Case Thickness
13.7mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Black
Jewels
20j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1965

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seikata-wm-0d76b9856302