Thought I'd add to this thread by posting these two similar (but different) New York, NY precancels on Scott #561:

First, there's a distinct color difference between the two examples (even though scans don't do it justice). Is this just a color changeling or could it be one of the varieties noted in the Scott Catalog (i.e. rose vs. pale rose)?
Secondly, there is a distinct difference between in the New York, NY precancel overprint, especially noticed in the line "N. Y." Including periods, the State name in the left example is 10 mm; the right example 9.5 mm.
Any comments on these differences would be appreciated. Thanks.