Seiko Cal. 5647 - 231

Seiko 5647-231

The 5647-231 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5647 caliber with 28j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-63ed5afa8b44]

Also known as: Tuna, Baby Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Black
Jewels
28j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1978

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seikata-wm-63ed5afa8b44