Artists that expect to make money from their work will never sign with initials !! That is a sure sign of a hobbyist !! Can you imagine walking into an art gallery and asking to see a painting by "M Z" ?? Art is name recognition,, if they do not know your name,,you may as well quit now !! What if Norman Rockwell just signed N R,, no one would know him today !!
And the back is "Mrs. Beckstrom !!