smvdbrink
You're right that the flag wasn't used in most of the years that you added coins for. However, the issuer Germany - 1871-1948 used that flag most of the time, so I can understand why it's there. Alternative would be that you have the flag animation changing from this, to Third Reich, to the current German flag. I seem to remember that that was once used, but it appears that they chose for this static flag now.
Then a .gif should be applied of the different used flags, but that would probably not be possible.
PS, I never knew that flag, ok, I was only born in 1946, so that might explain it? The flag used here is from the German Empire, bizarre.
Globetrotter
Coin varieties in French:
https://monnaiesetvarietes.numista.com