The following item are not listed in Scott (Surprise!!!). I have a set of souvenir sheets from the Central African Republic. They are similar to Scott# 502-5, C263-4 from 1982.
I also have Rwanda Scott# 1212 in an imperforate version.
Does anyone have catalog numbers from other catalogs and possible value. Thank you.
As regards to the imper Rwanda sheet, it is the imperf version of Scott #1212 (yes, without the WWF symbol). As noted near the beginning of the listings for Rwanda, almost all of the stamps issued by Rwanda exist imperf.
Since this is a limited release stamp, Scott does not list it. A dealer years ago told me that if you don't have a specialized catalog, that the imperf value for such stamps is roughly double the catalog value of the regular stamp.
The Central African sheets are of Scott #502 and #503. These are special presentation sheets, and were not valid for postage. Thus they are not listed by Scott. The stamps if removed from the sheets are not worth much.