Sperry Marine 074799-0000-000 Rev F2 Type 4991-00000-00 Navigat X MK 2 Digital Gyro Compass with Sensitive Element, Used-Although No Errors Occurred While Powering On The Unit, The Item Was Not Fully Tested so Listed for Parts/Repairs or Not Working-Item Will Ship Assembled As-Is Via LTL Freight On A Pallet To Remain Upright-Pictures Taken At Initial Cold Start And Again After Approximately 1 Hour of Settling-No Errors Appeared While Powered On Other Than The Initial Prompt That Recommended Annual Maintenance Is Due-See Pictures