1970 (D) Qtr Has The1941 Canadian Quarter In The Background

Hello I'm new to the site but not new to coin hunting Iv been doing it half my life as my father did but I had not been doing it for the last 5-6 year, so I know enough that if I see something unusual then it usually is .. I saw a coin on one of y'alls forums about the 1970S proof quarter that has the 1941 Canadian quarter on it also, and this may seem impossible but I'm here to tell you it is not because I have one.. I had threw it in what I call possible missing clad pile so I had actually had it for near a month before looking at it so one day I noticed a a shiny reflection in front of the beak and what Iv found is unexplainable other then maybe when the proof one was made they/whoever made it made this one also.. no one knows why the 1941 was even there so in that case no one knows who made what in that situation, am I correct? Feel free to school me as I am rusty but confident seeing how it on the obverse and reverse...!! I'm posting what I wrote until I figure out how to upload the image to the thread because it freezes soon as it starts to load and throws a error..