U.S. Machine Cancel Identifier – Potter/Vail Herringbone
The Potter and Vail machine was experimental in nature, and is quite rare. They are seen from only a few smaller towns in Illinois, from 1898 to 1900. This herringbone pattern cancel has been seen with both oval and rectilinear postmarks.
![[potter vail experimental machine ]](../machines/potter_and_vail_experimental_machine.jpg)
Potter and Vail experimental machine
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