Here is a useful thread with a sheet of all English coins, that @credits used to collect in the past. It’s last been updated in 2018 by the looks of it though, so not sure how up-to-date it is. But I think he stopped collecting them since last year and only focuses on Energy cards now.
I think @joshius also collects coins and might perhaps be able to help with some of the questions.
Greetz,
Quuador