Seiko Cal. 6616 - 307

Seiko 6616-307

The 6616-307 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6616 caliber with 21j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-a6ba4e88beb5]

Also known as: Monster, Arnie

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
46mm
Case Thickness
15.5mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Blue Sunburst
Jewels
21j
Frequency
28,800 bph
Power Reserve
45 hours
Year
1968

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