Seiko Cal. 3818 - 550

Seiko 3818-550

This Hand-Winding model from 1969 features a 40mm Two-Tone case. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-1c93d2168cdb]

Also known as: Monster, UFO

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
40mm
Case Thickness
12.1mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Navy
Jewels
21j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1969

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