Richard Shotwell/Associated Press

Oscar Robertson's 1970-71 NBA championship ring fetched $75,948 at auction Friday night.

The bidding, which opened at $20,000 on July 15, escalated steadily over the last month and skyrocketed this week.

After the high bid Wednesday settled at $51,874, a pair of submissions Thursday pushed the price north of $60,000 before the lot closed Friday.

According to Lelands, the ring—which includes a diamond surrounded by the inscription "NBA World Champions"—was one of 51 pieces in the Oscar Robertson Collection.

Other items included Robertson's Naismith Memorial Basketball Hall of Fame ring, game-worn jerseys and All-Star Game rings.

Robertson, one of two players in NBA history to average a triple-double for an entire season, helped lead the Milwaukee Bucks to the title alongside Kareem Abdul-Jabbar.