Your gun is a Minier model Ithaca from 1907. "Manier" was a misprint on a serial number chronology Ithaca Gun Co. put out back in the 1960s. These were nice "utility grade" guns, made only for a couple of years, and are not in the same demand as the high grade Ithaca doubles. Depending on condition, these usually sell for $300-$400. PLEASE have this checked by a competent gunsmith before shooting ANYTHING in it. Guns from that time period sometimes had shorter chambers, and it IS 111 years old.