That is a very nice survivor Jim , its in outstanding condition and runs exquisitely, these are among my favorites lately.
It always amazes me the workmanship that went into the wonderful old German engines and the detail that they put into them.
Some of the real collectors pieces that I see on YT are just incredible works of art.
I also wonder if these were presents for boys or for wealthy grown men? These would have been a hefty outlay a hundred years ago.
I wonder that as well; I imagine that a more affluent man bought it for "his son" ...but had no issue in running it for himself mostly, due to the cost & complexity of many of the high-end steam plants.