Colorizing of old Photographs

Hi, my name is Mario Unger and i´m from Austria. in the last year i spezialized in coloring old photographs. if someone is interessted, you can find many examples here, from my beginning to my last works. if this isnt the right place to post it, please remove the post.
the attached picture is called "Chain-Gang" and it is from 1903

https://www.facebook.com/pg/altefotosinfarbe/photos/?ref=page_internal