SEOUL - Samsung Electronics, the world's largest maker of handsets, memory chips, televisions and flat screens, estimated Friday its fresh record quarterly high of operating profit for the second quarter.

The preliminary operating profit unveiled by Samsung was estimated at 6.7 trillion won ($5.89 billion) in the April-June period, up 78.67 percent from a year earlier, and topping the previous record high of 5.85 trillion won tallied in the prior quarter.

Sales were estimated at 47 trillion won ($41.34 billion) in the three months ending June 30, up 19.17 percent from a year before. The figure was up 3.82 percent from three months earlier.

Samsung did not unveil its estimate for net profit and a breakdown of each division. The final results will be announced later this month after auditing and the approval of board of directors.