Part 1 of William Barlow's Boston Machine Cancel exhibit may be of help to you.
http://www.machinecancel.org/exhibits/barlow_boston/index.html
That exhibit link is a big help. Thank You
I can't find much on the internet. I do know they started in the 1870's and they had several types. The most common ones seem to be the ones with the little "football" killer cancels. I don't believe they were used in too many cities. There were also handstamp cancels with those little football killers and I do not know how to tell the difference. Is there any internet reference that shows the types, cities and years of usage? I don't want to buy an expensive out of print book or have to check it out from a library.
Any information would help me out a lot. I bought a large collection of 19th century postal cards,(1000's) and I have been dividing it into lots. I started by pulling out the Minnesota stuff for myself, then I went to finding the DPO's from other states that I have been selling on Ebay for the last six months or so. Lately I have been separating the remainder into cancel types and I am a lost on the Leavitt types.
re: I need help in identifying Leavitt cancels
Part 1 of William Barlow's Boston Machine Cancel exhibit may be of help to you.
http://www.machinecancel.org/exhibits/barlow_boston/index.html
re: I need help in identifying Leavitt cancels
That exhibit link is a big help. Thank You