I can't make out the date mark but before 1945 based on single letter/number.
Wabash Railroad BANNER 9 3/8" DINNER PLATE RR SYRACUSE CHINA 93-E code--May 1964
3PC Wabash Railroad Syracuse Dining Car Plate + Bowl Set China Monroe Pattern
Wabash Railroad Syracuse Dining Car 9.5" Plate Banner Pattern Follow The Flag
Wabash Highland (Banner) Syracuse 9" Dinner Plate
SYRACUSE WABASH R R PLATE 9 1/2" Restaurantware Vintage Railroad Hotel Great...
VINTAGE HANDLAN WABASH RAILROAD LANTERN W/ETCHED (WABASH Ry) RED CORNING GLOBE
