The 100-year-old, super rare, game-worn jersey rocked by one of the world's first basketball stars is on the auction block ... and it's expected to rake in a quarter of a million dollars!
The threads belonged to Basketball Hall of Famer Joe Lapchick ... a star on the New York Original Celtics in the 1920s (no relation to the Boston Celtics, who didn't even exist until 1946).
Lapchick -- a 6'5" big man known for his athleticism and agility -- is regarded as one of the best centers of his generation.
In 1923, JL joined the famed Original Celtics -- the 2nd incarnation of the New York Celtics -- who were disbanded during World War 1.