I found some precancels that I can't indentify in the PSS Town and Type catalog.
The first one is from Baltimore:
The lines are 10mm apart, with leters 2mm high, town and state 2.5mm apart.
The second is from Concord:
The lines are 14.5mm apart, with letters 4mm high, town and state 2mm apart.
And the last one from Boulder:
The lines are 11.5mm apart, with letters 2mm high, town and state 2mm apart.
Thanks for the help.