Brass, 24mm diameter with suspension loop. GALLANTERI & UDSTYRSFORRETNING * PORCELAINSHANDEL * around, KJØBENHAVN  22 SLOTSGADE 22  N. in centre.  R. View of the Stock Exchange building, in ex. BÖRSEN above N H & Co.  Fingerprint mark on reverse, otherwise EF or better with much original colour and lustre, 

The N H & Co is N Hansen who sold other things besides Porcelain. They were also responsible for the manufacture of advertising items such as this medallet.