Circa 1935... Originally on a black and white glass photographic plate "negative", photographed in front of a light-source then rendered "positive" in Photoshop. I have ~150 similar images!
Thanks Allen. I have some more B&W images at www.RPDforums.net including some I found if my Great-GrandParents from Paisley, Scotland. Also my father (William) as a wee boy!