First of all, thanks for all the input! I bought the gun some 6 years ago from an individual who was a naturalized citizen from South Africa, who told me that, that was where he had picked the gun up. So that has a little reference to some of the information put forth.
And to add a little more mystery, I had a good look at a copy of the original H&H order sheet for the gun again this afternoon, which is in Victorian script.
Among other details on the gun it states "Shot with 5 Drams long R. bullet paper's, 4 1/4 Drams Eley bullet ?fafeit?" (this last word is difficult to understand i.e. Victorian handwritten script). A little more information to chew on! What do you think? Herb