Gutzon Borglum: 5 1/4” x 7 3/4” Christmas card with mounted silver bromide photograph showing Mt. Rushmore under construction. Some faint lines in the sky look like shooting stars or meteor showers but, as explained on the backside, were the result of a two-hour nighttime exposure. Inscribed at bottom: “Season’s Greetings from the Borglums”. Both the inscription on the front and explanatory note on the back are in the hand of Mt. Rushmore sculptor Gutzon Borglum. Very minor vertical bend at the bottom, as shown. The first example I have seen.