If Spurs succeed to make the 5/5 in the finals to win the title, then they will achieve something that has never happened before in the NBA. Will become the first team to win (at least two) titles in 11 years, while maintaining at least the same three players to its roster! Duncan, Parker, Ginobili was present in the title of 2003 and they are all still here, 11 years later. No group has done that before, as that will attempt to achieve the Spurs in this year's finals, which will begin on June 6.
Neither the Lakers last 15 years (they had only Kobe Bryant, Derek Fisher in championships won from 2000 to 2010), not even the empire of the Celtics in the 60s, since Bill Russell, Sam Jones, Tom Heinsohn, Bill Sharman and John Havlicek (they won most titles) played several years together, but never three of them did not play simultaneously in a champion team of "Celtic" in over 11 years.
The record Duncan "chasing"
At the individual level, not Tim Duncan is another four victories from doing something (also) unique. If the Spurs get the championship, then Tim Duncan will become the first player to win with the same team two titles at 15 years old! Kareem Abdul-Jabbar took his first title in 1971 and his last in 1988 (at 18 years), but in 1971 he played the Bucks in 1988 and the Lakers.
Robert Parish, no, he won two titles within 17 years, but in 1981 he was player of the 1997 Celtics and the Bulls.
At present, the relevant record shared by John Havlicek and AC Green, who won just 14 years old the first and last title, playing on the same team. With the difference that the former won his first title with the Celtics in 1963 and stayed in Boston until they get to the last, in 1976, while Green went from Phoenix and Dallas until you come to LA in 2000 and be crowned champion, something that had happened in 1987 with the Lakers.