Doane cancels were issued to small post offices between 1903 and 1906. Here's a basic primer about the 3 types of Doanes.
All Doanes have a number in the killer bars. The number represents the amount of business the post office had done in the previous year. The examples below were chosen because they illustrate well the differences between the Types.
Type 1 Doanes are easy to identify since they all have 5 killer bars with a number in the center.
Type 2 and Type 3 Doanes both have only 4 killer bars with a number in the center.
Type 3 bars were issued completely filled. There are other differences between Types 2 and 3 but these are the most obvious.
