SAD DAY IN CENTRAL NEW YORK . . . For some it was an opportunity to buy parts. For others it was a chance to bid farewell. The occasion was the Nov. 29 going-out-of-business liquidation auction of Ithaca Gun Co. The company, founded in 1880, had moved to Auburn, N.Y., last April, in anticipation of a sale to a Rhode Island investor, reports The Citizen, but when that arrangement fell through around Memorial Day, the company closed its doors.