Seiko Cal. 6658 - 271

Seiko 6658-271

This Hand-Winding model from 1973 features a 40mm Hardlex-Coated Steel case. Powered by the 6658 caliber with 34j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-6bf087d8ab44]

Also known as: Helmet

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
15.0mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Cream
Jewels
34j
Frequency
28,800 bph
Power Reserve
38 hours
Year
1973

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seikata-wm-6bf087d8ab44