Seiko Cal. 3818 - 740

Seiko 3818-740

This Hand-Winding model from 1969 features a 44mm Stainless Steel case. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-c43fb18319a5]

Also known as: Sumo, World Timer

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
44mm
Case Thickness
15.4mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
White
Jewels
27j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1969

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