Seiko Cal. 5643 - 364

Seiko 5643-364

The 5643-364 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5643 caliber with 19j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-32756a64ca09]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Champagne
Jewels
19j
Frequency
28,800 bph
Power Reserve
55 hours
Year
1968

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