Seiko Cal. 0728 - 642

Seiko 0728-642

The Seiko 0728-642 represents an important milestone in Seiko's 1976 lineup. Powered by the 0728 caliber with 24j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-b054d7b45ecc]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
9.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
White
Jewels
24j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1976

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