Very attractive, no date, 1950s black crosshair dial. Fully serviced automatic caliber 501 movement (April 2020), serial 1634887. All steel case, reference 2846. Gold hour markers. Vintage crown with no Omega logo, snap on caseback. Fully serviced with the following mean test results (5 positions): Rate= 0,29 s/d, Beat= 0,50 ms, Amplitude = 261,8 degrees. Diameter of case without crown is 34mm. Dates from ca 1958.