Stamp 12 USA
You will need to measure the perforations and dimensions of the design in order to positively ID this stamp.
It could be Scott #554, #595, #579, #583 or #634

Stamp 13 USA
1932 #720 3c deep violet George Washington 0.20

Stamp 55 USA
You will need to measure the perforations and dimensions of the design in order to positively ID this stamp.
It could be #552, #594, #596, #578, #581, or #632.
