Use a magnifying glass to see if the original has any "scratch or machine looking marks". You can usually tell right away and not ruin the piece by experimenting.
The plaques are for Sertoma. They are purchased through the Sertoma website. They are mass produced and engraved either through the Sertoma website or by the purchaser. I did send an email to see if I could get any info from them.
Probably in this case, better safe than sorry.
Thanks all
Becky