Vtg Lady w/Poinsettia Hat & Butterfly Christmas Card ~ signed M Hamilton Mary?

Description

Darling graphic
Signed in white -   M. Hamilton - (I almost missed it)
There is no maker ID on the back - only P 136.
Measures 3 1/4" x 7".
Folds open
Has been signed
Very nice condition but there are three small spots.
First class mailing is free.