She has what looks like a sprig of some evergreen tucked into her hat, which is a festive touch.
Almost everything on this "A hearty Christmas Wish" postcard — girl, sled, borders and text — is embossed. The longer piece of text states:
I wish you a Merry Christmas
Just as grown Folks do and
I wish that all your Christmas
Dream may really come true
The postcard was never stamped or mailed, but there's a short note written on the back, in light pencil. Something about William, a cousin and "he will be taken." The sloppy cursive is too difficult to fully decipher.
The only other clue on the card is the "C-174" in the lower-left corner on the front. Which is not much of a clue.
I did discover a postcard, on CardCow.com, that clearly came from the same series back in the day. That one was used and postmarked in 1915, which sounds about right for this one.