Seiko Cal. 4565 - 646

Seiko 4565-646

The 4565-646 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4565 caliber with 22j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-f6a17d9f5b7b]

Also known as: Sumo, Tuna

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
39mm
Case Thickness
10.6mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Green
Jewels
22j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1976

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