"Illegal" Rose Stamps

In an effort to inform collectors of rose stamps about illegal issues which may be found for sale online and at some stamp shows, I am attempting to keep up with illegal issue circulars as reported by the UPU. 

It is ultimately up to the collector as to whether they buy these stamps or not. My goal is to inform potential buyers of such stamps that they are in fact illegal and are therefore invalid for postage.

ANGOLA
    International Bureau Circular 406
        -    Sheetlet of 6 stamps, 3500000 NKz, depicting roses

BENIN
I suspect the 2008 Benin rose stamps pictured here are probably illegal but I have not been able to find out for sure yet.

RWANDA
    International Bureau Circular 363
        -    4 One miniature sheet comprising six postage stamps illustrating various varieties of roses. The values are in vertical
             columns of 100F, 200F and 300F.

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