(1) This is a Doane Mimic.
(2) A cover dated 27 Dec 1914 has 3 short parallel bars as a killer with no doane numeral shown.
(1) Known example appears without killer bars.
(2) Later examples appear without killer bars.
(3) A composite of a double circle cds and Doane killer bars.
(4) A Doane mimic which resembles a Type 3 device, but has thick bars
squared off at the left.
(5) Doane number deformed into a dot in late use.
(6) Doane killer bars replaced by bars of a Type A 4-bar in later use.