Remember the sizzling, scintillating summer of 1977 when Billy Martin’s Yankees stormed past the Red Sox and went on to capture their first World Championship in 15 years by beating the Dodgers in six games as Reggie Jackson blasted three home runs in the grand finale?

In this series, The Post takes you back 30 years to one of the greatest seasons in Yankee history.

SEATTLE-Reggie Jackson has either a written clause in his contract or a verbal understanding with George Steinbrenner which would allow him to ask out of his five-year agreement with the Yankees at the close of the season, sources have told The Post. It appears as if Jackson intends to exercise that option.

The outfielder declined to comment when confronted and asked if such an agreement exists. “I won’t say,” he said. “I wouldn’t answer if I did or did not.

“The contract is the same on both sides; we both have the same obligations. I will say there is a clause in my contract that if any terms of the agreement become public in whatever way the contract becomes null and void. That is written in.

“My contract has many different features; I think it runs six pages. Revealing any portions of it is an infringement on my business privacy.”

Steinbrenner denies the existence of such a clause.

Jackson’s recent comments indicate he does not expect to be back in New York next season. Before Wednesday’s game in California, Jackson was kneeling in foul territory when he was asked about the escape clause.

“What makes you ask?” he said.

The reporter reminded him of his latest remarks, the ones Tuesday, when after sitting against a lefthander for the fourth straight time, he held up his uniform and said, “this (the uniform) is going to be quite a memory. Yep, quite a memory.”

Jackson smiled and looked down at his blouse. “Get a good picture of that bleeper,” he told the writer. “It’s gonna be a collector’s item.”

Somebody asked Martin about free agents the other day. “At the end of the year, you’re going to find some of them have great statistics but they won’t have helped the ballclub. They’re individuals, not contributing to the team.”

The question was a general one. Was Martin’s answer?