I Hate to keep imposing on everybody, but the PSS manuals I've ordered haven't arrived as of yet.
I believe this 7 cent (Scott 639) is a bureau precancel. The line spacing is 13 mm, the letter height is 2 mm, and the word Baltimore is apx 11 1/2 mm, which in my opinion makes it #61. However I was told by another collector that the lines must go all the way across for it to have been done by the bureau.
I would greatly appreciate any feedback on this subject.
