Seiko Cal. 7099 - 637

Seiko 7099-637

The 7099-637 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7099 caliber with 33j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-d01ca7b546da]

Also known as: Helmet, Bellmatic

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
39mm
Case Thickness
9.7mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
170m
Dial Color
Silver
Jewels
33j
Frequency
28,800 bph
Power Reserve
70 hours
Year
1970

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seikata-wm-d01ca7b546da