Seiko Cal. 0721 - 775

Seiko 0721-775

The 0721-775 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0721 caliber with 36j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-e8cf928d9ae7]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
13.0mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Green
Jewels
36j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1978

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