Hello, I realise I have not written for a while.   Hope you will forgive me.  Just had no ideas. But then I came across this and while for the philatalelist  specialist I think, I hope other readers also enjoy seeing it.

This is from the 1966 Anniversary of Central African Airways and shows a de Havilland DH.89 Dragon Rapide.

Similar looking stamps in the pair, as seen above, but a variety exists   Not sure how this will show but click on the image to enlarge. There is a print offset on the colour and especially seen in the tail number on the right hand stamp

rhodesia-393-printing-error-on-tail-number  This is going up in my store soon.  watch out for it as I think it is quite an interesting addition to any collection.  Best wishes.. Michael