Local printed with perfin “G.B.” in the stamp. The prospect is franked correctly with 2 øre, which was the rate for local printed matter in the period from December 1st 1905 to October 31th 1917. This flyer has been included in the Journal of Doctors, which was printed and distributed by Gyldendal and handled by the newspaper post office in Copenhagen and was to be stamped separately as a local printed matter. The stamp is cancelled August 4th 1915 København Avispostkontoret nr. 7a Kjøbenhavn A++P. Bro Ia.

Gyldendalske Boghandel, Nordisk Forlag A/S, usually referred to simply as Gyldendal is a Danish publishing house.

Founded in 1770 by Søren Gyldendal, it is the oldest and largest publishing house in Denmark, offering a wide selection of books including fiction, non-fiction and dictionaries. Prior to 1925, it was also the leading publishing house in Norway, and it published all of Henrik Ibsen’s works. In 1925, a Norwegian publishing house named Gyldendal Norsk Forlag (“Gyldendal Norwegian Publishing House”) was founded, having bought rights to Norwegian authors from Gyldendal.

Gyldendal is a public company and its shares are traded on the Copenhagen Stock Exchange (Nasdaq Copenhagen: GYLD A, GYLD B).

Gyldendal stopped the print version of their encyclopedia in 2006, focusing instead on selling paid subscriptions for its online encyclopedia, Den Store Danske. By 2008 it had decided that it needed another approach to support that online site. Since February 2009 Gyldendal is publishing an online, subscription-free encyclopedia.