Antique Johnson Brothers Merry Christmas. Macquarie salad plates

  
5 Johnson bros square salad plates. Measures approx 7 3/4 across. All plates are stamped on back but one plate has a different size stamp. I tried to take a pix of one of them.

One plate also has glazing. I didn't see any chips or cracks. When I was stacking them up I did notice the one with the different stamp is slightly smaller in size and has a tiny chip on an edge.