Seiko Cal. 6657 - 301

Seiko 6657-301

Released in 1978, the Cal. 6657 with design code 301 was part of Seiko's domestic market collection. Powered by the 6657 caliber with 25j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-af07c151f92d]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
11.4mm
Lug Width
20mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Black
Jewels
25j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1978

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