The top coin is a 1946 and the bottom coin is a 1946-S. Each has a small clip but properly called an incomplete planchet. The ‘46 is clipped at 11:00 o’clock and the ‘46-S is clipped at 2 o’clock. The 3rd and 4th photos show a perfect fit on the clips.
You’re correct it’s not always true but in this case, given the age, I’d say the effect was worn off years ago. Lol