Seiko Cal. 3899 - 856

Seiko 3899-856

This Spring Drive model from 1980 features a 40mm Hardlex-Coated Steel case. Powered by the 3899 caliber with 34j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-64aef7f8d96d]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.6mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
110m
Dial Color
Cream
Jewels
34j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1980

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