Looks like a good piece to cut your restoration teeth on. It might turn out better than anticipated if the cooking surface isn't pitted, although I suspect it might be along that one edge. The bottom doesn't look bad at all, nor does the handle. The 1109 is a catalog number, the M identifies the unique pattern from which the mold was made. The font and fineness of the C/N inscription tends to indicate later in the period of production of pieces marked with this trademark, which was ~1930s-1959.