WWI U.S. Purple Heart?

[Fanof49ASU]

I'm new to the forum, and really enjoying it.

I'm wondering how many of these citations have shown up here. I know that local collectors of military memorabilia haven't seen very many, if any at all.
Anyways, from what I understand, these citations were given out to combat wounded before the purple heart was established. Please correct me if I'm wrong.

(This is from a family member.)

[ArthurW]

The certificate was issued to sick and wounded soldiers during WW1. Later on it was used as an inspiration for the logo of the Disabled American Veterans Association.