Seiko Cal. 3872 - 643

Seiko 3872-643

The 3872-643 is a sought-after Kinetic piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-11b68f7474fb]

Also known as: Helmet, World Timer

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
34mm
Case Thickness
13.1mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
120m
Dial Color
Navy
Jewels
22j
Frequency
28,800 bph
Power Reserve
50 hours
Year
1969

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