I have the following information about the unidentified medal:

In the exergue there are the letters B.U. which stands for Begeer Utrecht. Begeer (1880-1919) were a well-known firm in the city of Utrecht in the Netherlands who made many types of medals. The medal concerned is one of their stock medals, made in different sizes and metals for awards. This particular medal is an award for homecrafts (Huisvlijt in Dutch). The reverse of the medal has space for an engraved or, in this case, a stamped inscription.

O'HOUT is an abbreviation of Oosterhout, a city located in the province of North Brabant, in the south of the Netherlands. The date is May (MEI) 1916, which is in the period of the first World War. Although the Netherlands stayed neutral during this war, the army was mobilized. Near Oosterhout there were army barracks. These were visited by the Queen on May 17, 1916. This visit is described in a newspaper for the army (Soldatenkrant, orgaan voor leger en vloot) of May 28, 1916.

The Queen also visited an "huisvlijt tentoonstelling", an exhibition of objects made by the soldiers in their free time. This exhibition was organized by the "Comité tot ontwikkeling en ontspanning der gemobiliseerde troepen" which can be translated as Committee for development and relaxation of mobilized troops. In the inscription this was abbreviated as: C.O.O. In the newspaper article it is not stated whether or not medals were given by the Queen. My assumption is they were given by the Comité.

To read the earlier E-Sylum article, see:
QUERY: WHAT DOES THIS MEDALET'S INSCRIPTION MEAN? (www.coinbooks.org/esylum_v18n23a27.html)