Not unprepossessing

I suspect he was a young man in the early 20th century.  Brylcreem was first introduced in England in 1928, but his shag is rather full and bushy, not slicked, possibly pre-dating that wave of fashion.  The wallpaper looks more Edwardian than it does Deco. His body too, shows no hint of what became the fad of physical culturalists just a bit later in the century.  He sits, completely natural but poised, so he might be an artist's model.

See also: El Cid