Seiko Cal. 6377 - 640

Seiko 6377-640

The Seiko 6377-640 represents an important milestone in Seiko's 1976 lineup. Powered by the 6377 caliber with 36j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-c2ae07a48ed3]

Also known as: Baby Tuna

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
39mm
Case Thickness
11.8mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
60m
Dial Color
Burgundy
Jewels
36j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1976

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