Seiko Cal. 3865 - 734

Seiko 3865-734

The 3865-734 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-4a9f04a3d2f5]

Also known as: Sumo, Bellmatic

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
15.9mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Navy
Jewels
28j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1973

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