Need assistance on finding real value of "after monet" oil on canvass.
In excellent condition, oil on canvass "after monet" 30 x 24, beautifully framed, signed and dated. On the back upper left corner of frame is a slightly worn label that states where the artist studied and who he studied with. The artist's signature is Mackenzie and dated 1964. The label in the back states he studied under the direction of Ernst Krupp. I have done a large amount of research on line and seem to go in circles. There is enough information to state that Krupp was a well known and well respected artist and teacher in Munich Germany and many people on line from what I have found have noted in their bio's that they too studied and learned from this man. I believe this may be grouped under the "American Impressionism" but not sure. I am attaching a picture and hope someone can assist me in finding the real value of this beautiful piece. Thank you.