Seiko Cal. 5640 - 276

Seiko 5640-276

The Seiko 5640-276 represents an important milestone in Seiko's 1986 lineup. Powered by the 5640 caliber with 19j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-f0b7d51954c1]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
36mm
Case Thickness
13.1mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
170m
Dial Color
Champagne
Jewels
19j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1986

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