It's just a guess but I would suggest a very small number were cape guns. The Robust was MF's go-to base gun. Under 100,000 of all grades of Ideals made.....10 times more Robusts. And the Ideal had a 23 year head start. You can also get an idea of how big these volumes are when you compare them to American SxS production.

It's clearly a higher grade version of the Robust. The vast majority have little to no engraving. I have seen DAP tables as well as model grids (MF model labelling can be quite confusing as they changed it all the time) but I haven't saved them. Someone else here may have access to them.

The world cries out for such: he is needed & needed badly- the man who can carry a message to Garcia