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  1. Looking for a Citizen B612M calibre service manual

    Watchmaking & Tinkering - Reference Materials
    I have a Citizen Nighthawk that has a timekeeping problem. Citizen Black Nighthawk Eco-Drive model CA4377-53H with B612M calibre Symptoms: Watch charges, chrono hand works, both start/stop and reset are good but time (hr, min, secs) hands not moving, neither is the date dial. What i've...
  2. Removing inner rotating bezel from Citizen Nighthawk

    WATCHMAKING & TINKERING
    I recently purchased a used Citizen Nighthawk and I would like to remove the inner rotating bezel (rotary slide rule) to clean the case. Does anyone know how to remove this slide rule ring?
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