Seiko Cal. 3863 - 750

Seiko 3863-750

The 3863-750 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-23e60a4afb07]

Also known as: Tuna, Rally

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
15.9mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Burgundy
Jewels
27j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1980

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