After quite a bit of research, I have determined that this is not and I repeat not the Allendale pattern. The marking on the back of the plate signifies it is much older than the Allendale pattern. If you look at the underglaze designs, this pattern is 53305/53306. The handles look like it is part of the Puritan shape which was manufactured from 1903 to 1915. The Allendale pattern was manufactured under the federal pattern from 1938 through 1969.
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