Seiko Cal. 0721 - 270

Seiko 0721-270

The Seiko 0721-270 represents an important milestone in Seiko's 1977 lineup. Powered by the 0721 caliber with 36j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-c8a440bd5e9b]

Also known as: Silverwave, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
15.4mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Silver
Jewels
36j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1977

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