Seiko Cal. 4577 - 646

Seiko 4577-646

The Seiko 4577-646 represents an important milestone in Seiko's 1980 lineup. Powered by the 4577 caliber with 36j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-a3c2536cf2b7]

Also known as: Bullhead, Baby Tuna

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
11.9mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Silver
Jewels
36j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1980

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