This black board has the day's specials written on the left panel. The post times on the middle panel (get your bets in on time!) On the right panel: corrected odds format, ordinal numbers USA format, stable price unchanged.
Back side of the black board is an advertisement billboard.
Glue to sheet magnet (Refrigerator Magnet material), glue markers to sheet magnet material. Clear contact paper on top to protect the images.