Has There Been Some Changes To The Pss Style Chart Between 1990 To 2020?

Hi All,

Just getting back into my precancel collection and noticed a difference in the style chart in the 1990 catalog to the style chart from 2020 available from precancels.com.

As I was going through my stamps I came across a stamp from Council Bluffs IA. and I got a little confused. The style checks out to be 223 in the 1990 chart but the 2020 chart did not include the 223 or even the 221 which 223 referenced too. I probably missed something or its just that I am working off of an old catalog but does anybody know why they dropped the style and what should the new style # be?

Types 221 and 223 referenced having the state name in full. Since many shorter states came only that way before the 2-letter state format, it was decided a separate type was not required for that difference. Pretty sure those were folded into types 222 and 224. There are a couple of other places in the style chart that also happened. For the few places where a city has two similar devices that differ that way, one device has the SNF (state name in full) footnote. See Oakland CA 263 for an example of this.