What do I have here? At first I thought they were both simply variations of Type 44 precancels but upon closer examination there are differences in size.

The 1-1/2-cent stamp on the left is 12.5mm between bars, 2.5mm between bar and name, City name 17.5mm long; and State name 9mm long.
The 4-cent stamp on the right is 12mm between bars, 2mm between bar and name; City name 16mm long; and State name 8mm long.
Thanks.