On obverse of the coins in the lettering and on the date. I apologise for not responding sooner but I appreciate your opinions
The last coin was impossible for me to tell due to glare. light shining down at an angle is going to bounce of the edges which in bright light could look like doubling, and light coming from a couple of opposite directions could look like doubling on both sides which is very rare. The light on the surface here is diffuse enough to show doubling and by the shadow it is from one light source, not so bright that details can't be separated. Also many people do not light to comment on a coin if they can not detect it . There is a free photo program called photoscape which allows you to adjust the photos and add colors and lines. Such as this 1955-S/s/s. Jim