I have looked and searched this for the last two hours !! I am not sure that John is a typical Czech name,, at least with that spelling !! May be,, but I didn`t find it !! Checked European artists as well as American with no luck !! Since it is not by a listed and known artist,,it is more of a hobbyist piece,,value would be minimal !! But as to date I have looked at the texture of the canvas, how it is mounted and at the keys and my best guess would be that it was done early 1900`s !! More likely around 1910 or 1920 !! And there are numbers of 154 or 159 (couldn`t see it very well) on the bottom of the pic of the stretcher bar and I am thinking that would have been the price !! And that is about what it would have cost around that time !!