PHILADELPHIA, NOV 21 -- The long-lost Mozart manuscript discovered in a safe at Eastern Baptist Theological Seminary in July was auctioned today at Sotheby's in London for $1.72 million.

"This is one more marvelous gift to be thankful for in the Thanksgiving season," said the Rev. Manfred Brauch, president of the seminary in Lower Merion Township, Pa.

The seminary's directors will decide Dec. 1 how the windfall will be spent.

The price is the second-highest ever paid for a music manuscript, topped only by the $4.6 million paid in 1987 for a manuscript of nine Mozart symphonies, said D'Este Bond, a spokeswoman for Sotheby's.

Manuscripts of Franz Joseph Haydn, Johann Strauss Sr. and Ludwig Spohr, found in the safe with the Mozart manuscript, brought an additional $156,500 at today's sale, according to Sotheby's.

Brauch said the seminary should realize about $1.5 million from the sale of the Mozart score after Sotheby's deducted a 6 percent commission and expenses.

The 14-page document, the composer's working manuscript for his Fantasy in C Minor and the Sonata in C Minor, was placed in the safe in 1957, along with the other manuscripts. The unsigned manuscript includes some music left out of published versions.

Bond said the London dealer who bought the manuscript today told her he was acting on behalf of a group of Austrian cultural institutions. The document is to be kept at the International Mozarteum Foundation in Salzburg, Austria, Mozart's birthplace.

The other manuscripts found in the seminary safe were sold to three buyers, all anonymous, Bond said.