Seiko Cal. 6611 - 721

Seiko 6611-721

The 6611-721 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6611 caliber with 18j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-12d0cc3f05d5]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
37mm
Case Thickness
12.0mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Navy
Jewels
18j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1993

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