The cards are so-called because the name of a tourist destination was printed in three-dimensional block letters, each of which were inset with images of local landmarks.
[1] Sometimes called big-letter postcards, many featured the stock phrase "Greetings from..." which was derived from cards in Germany that read Gruss Aus.
[4] The postcards produced by Curt Teich (rhymes with "like")[5] and competitors were "distinctly American, rendered in an opulent style.
[6] The images were usually composed of hand-drawn letters and heavily retouched photographs that became almost painterly through the multiple design and production stages.
[4] Early designs had unrealistic quality in part because the composing artist had never been to the place depicted, but by the 1940s "color transparencies were being used more extensively as the image source, and pictures started to become more realistic.