Seiko Cal. 4536 - 185

Seiko 4536-185

The Seiko 4536-185 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-b21a16bd91cb]

Also known as: Tuna, Helmet

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
40mm
Case Thickness
9.6mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Green
Jewels
24j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1968

Related Models

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