I doubt he is the copyright owner of this image
The problem with this argument is that copyright is based upon date of publication, not date of creation. While it is true the image must have been made during or before 1921, there is no evidence that the image once created did not sit in a private collection for many years before being published.
Looks like a scan from a magazine or book; seems unlikely to be from a uploader's private photo collection.
No evidence that the author has been dead for 70 years, copyright claimed by the Hulton archive:
The uploader has only made few edits on Commons
unused private image - out of scope
per nom. –