524.    $400

LeCoultre “Atmos Model 528-6”, 1960-1980.  This model has the serial number 157513 and is 9.25 inches tall and 8.25 inches wide.  The brass finish is bright, the glasses clear, the dial clean and unmarred.  The adhesive on the front of the base can likely be removed with a bit of rubbing alcohol.  I don’t test Atmos clocks, you’re on your own there. $400-$600.