NEW YORK (AP).- A 17th century portrait that once hung over the fireplace of Elizabeth Taylor’s Bel Air home — and only recently reattributed to the Dutch master Frans Hals — is expected to fetch up to $1 million at auction. “Portrait of a Man,” painted in the early 1630s, is being offered at Christie’s sale of Old Masters on Wednesday. A Hals scholar, Seymour Slive, had listed the painting as a “doubtful” Hals in a 1974 catalog, based on a black and white photo of the work. After Taylor hung it in her home in the 1950s, “It academically fell off the radar,” said Nicholas Hall, head of Christie’s Old Master paintings. But last summer, Christie’s and Pieter Biesboer, the retired curator of Old Master paintings at the Frans Hals Museum in Holland, confirmed the work was by Hals. “From 20 yards away one could tell that it was an utterly authentic Hals, a totally characteristic picture with all the bravura, brushwork … the very expressive face,