Seiko Cal. 6616 - 657

Seiko 6616-657

The 6616-657 is a sought-after Solar piece from Seiko's golden era. Powered by the 6616 caliber with 34j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-fef4574a4717]

Also known as: Monster, Helmet

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
10.2mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Silver
Jewels
34j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1974

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seikata-wm-fef4574a4717