New York Knicks legend Willis Reed's warmup jacket from Game 7 of the 1970 NBA Finals -- one of the most famous moments in basketball history -- is about to hit the auction block, and is expected to sell for a huge chunk of change!
TMZ Sports has learned the infamous jacket Reed wore during the "Willis Reed Game" ... as he limped onto the Madison Square Garden court for the deciding contest against the Los Angeles Lakers will soon go to the highest bidder.
Remember, Reed tore his thigh muscle in Game 5 of the series against L.A., and missed Game 6 because of the serious injury.
The closing price will be significantly more money.
GFA tells us the warmup jacket has been photo-matched to ensure its authenticity. Experts examined several images of Willis in the jacket, including stills from his interview with legendary broadcaster Howard Cosell during the team's championship celebration.