South Africa Revenue 1946-1952 SOLVED

A few other things to look for in these. 

There is a year included in the design, right at the base of George's neck.

Also, they alternated English and Afrikaans on the sheet, so bilingual pairs are possible.  Since they were made with two plates, it is possible that individual stamps could unintentionally end up as 'bilingual singles' with one language for the country name and the other language for the 'REVENUE | INKOMSTE'  in the bottom tablet.  These are considered errors.

Here is an example, with the appropriate format in the left column (2sh6d) and the errors in the right column (5sh):


The combination of (a) 15 face values; (b) bilingual stamps; (c) errors; and (d) date codes makes this an interesting set to work on.  You could easily work on a mini-collection over the years, checking all that you run across.  (At least, that's my approach.) 

The errors are manageable.  Most dealers don't know what these are, to say nothing of knowing about errors, and the 5sh errors, above, are only known from 1948.  Of the five values with errors, three are known from 1 year, and the other two are known from 2 years, so they are out there, but not innumerable.

Hope this turns someone on to these...they are neat.

edited to add: an example of a vertical pair, the One Pound/Een Pond: