Seiko Cal. 3840 - 852

Seiko 3840-852

The 3840-852 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3840 caliber with 24j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-d83798d7fb96]

Also known as: Turtle, Sumo

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
9.7mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Black
Jewels
24j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1966

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