I saw for the first time that the 1957 one penny coin from 1957 has two variants on this site
https://mail.yahoo.com/d/folders/1?.intl=fr&.lang=fr-FR
I checked my coins and set up this documentation:
The CR has been issued and accepted, but maybe we need a new year line?
The wide date is not common according to this site http://cpmarchives.classiccmp.org/cpm/mirrors/www.triton.vg/P57.html , 9 out of 274 analyzed coins.
What's your opinion?