The stamp has the no value indicator of the C rate, used for international mail outside Europe, and featured a carnation that is made up of various Spanish landmarks. The only one I recognize is La Sagrada Familia in Barcelona.
The fantastic envelope shows Eva's watercolor cardinal bird. the male is considered to have a brilliant red color, but today's post makes me think of the words crimson and carmine.
And more yellow on the back.
Eva asked me if I thought her cardinal was red enough. I thought I'd poll the audience - so what do you think? Is he red enough?