I like the striking simplicity of this card. The dark blue fir sprigs, sprinkled with a few red berries, adorn the red, white and blue background, and red and white stars are scattered all over it. I believe this card may be from 1946 or so -- not long after the end of World War ll.
And here's another vintage card with similar colors, from a similar time frame. The top photo, with the blue-gray background, is the front of the card.