The Chevalier Theatre Organ Society will hold its annual meeting on Saturday at 1:30 p.m. at the Medford Historical Society, 10 Governors Ave. The meeting is open to the public. The guest speaker will be Gary Phillips, a principal at GHP Associates, an Attleboro company that specializes in restoring orchestral organs. The nonprofit was formed to raise money to restore and maintain a vintage 1922 pipe organ at the 2,061-seat theater, which is owned by the city. The society so far has raised $34,000 of its $55,000 fund-raising goal.