The drawings of that story were scattered by Hergé who enjoyed to present them to his collaborators and friends. Some pieces come at auction to the delight of the collectors.
Prices follow the degree of tension in the story. The cover art in which Tintin shears the beard of the professor was sold for € 380K including premium by Banque Dessinée on June 28, 2015. The more emotionally charged drawing where Milou (Snowy) brings the sceptre back to the king was sold for € 540K including premium by Millon on 14 December 2014.
Now let us consider the original art of the double pages.
Sheet 75-76 was sold for € 243K including premium by PIASA on May 29, 2010. Sheet 95-96 advantaged by the highly popular theme of war aviation was sold for € 1,56M including premium by Sotheby's on 24 October 2015. The final double page of this story will be sold by Artcurial on April 30 and will be the subject of another discussion in this column.
Sheet 77-78, published by Le Petit Vingtième in early May 1939, is estimated in excess of € 900K for sale by Tajan in Paris on March 12, lot 93. Here is the link to the auction house's website.
It is highly appealing by the cleverness of the action: Tintin finds that the leaving of the sceptre from the closed room was performed with the photo camera turned into a catapult by the thief. He validates his theory by throwing a model by this method up to the woods beyond the river. Arriving at the presumed location of the impact, he sees two men obviously busy to search for the real sceptre.
SOLD for € 650K before fees