Salem China Co. Child's Divided Dish

Hello,
Can anyone provide any information about this item? I'm having difficulty finding approximately when this child's dish was produced. I also notice, based on the few similar items I've found, that there are a couple of differences. I have not found the exact item on the net.
Here is what I see:
-On my piece the lamb appears in one section without Mary (or Little Bo Peep)
-Jack Horner does not have a cow next to him as depicted in other photos I've seen.
-The cartoon in the large section is the same in what's been found.
-My piece has a Salem China Co. mark on the bottom, while similar items I have found have no mark on the bottom at all.