The Imperial German Colonial Medal (Kolonialdenkmünze) was established by Kaiser Wilhelm II on 13 June 1912 with revisions on 17 February 1914.  The medal with clasps was awarded retroactively.  This guide will address only the DEUTSCH-NEUGUINEA 1910 clasp which was only worn officially on the bronze combatant version of the Kolonialdenkmünze.  If you are interested in details of these events, some internet sites provide further information - especially about the February-March events.  The best specialist sources are in German while the Australian sources are improving but specialized history and linguistic books are the best English language sources.  The clasp DEUTSCH-NEUGUINEA 1910 was awarded for 2 different actions in Papua, New Guinea:

•  During February and March 1910, there was some native unrest in the north coast mountain region of Potsdamhafen (Papua, New Guinea).  The plantation owners were afraid that banditry would return and they requested the German Colonial Government for assistance.  Police Troops (less than 100) were dispatched to the region to patrol the area and to calm the residents’ fears.  Each patrol was commanded by a German Polizeimeister (Police Sergeant) of which there appears to be at least three.  Normally, operations similar to these are commanded in the field by a German Leutnant (Lieutenant) but the specific data has not yet been located.  Tentative data indicates that the German Polizeihafenmeister (Police Harbor Master) was also entitled – a fairly rare occurance.  The best primary research source for this is the 1910 Amtsblatt für das Schutzgebiet Deutsch-Neuguinea.   The majority of the Police Troops also participated in the November patrols.
• In November 1910, a number of Police Troop patrols each led by a German Polizeimeister (Police Sergeant), consisting of less than 75 men total, were sent out to establish security in the mountain region along the Rai Coast (Papua, New Guinea).  Most of the men had served in the February and March patrols as well.  Normally, operations similar to these are commanded by a German Leutnant (Lieutenant) but the specific data has not yet been located. There were some accidental injuries to the Police Troops and casualties to the Ngaing residents. 

This clasp was awarded only to Imperial German Colonial Police Troops.  While the medal is somewhat rare, these bronze DEUTSCH-NEUGUINEA clasps are very rare.  Medals with this clasp to verified participants serving only along the Rai Coast are the most highly sought after but documentation is required.   Currently, this bronze clasp is only known one type:  same width as the ribbon, wide lettering, pebbled background and with sharp flat prong backs.

• In 1999, a single clasp was sold in Germany for €144
• In 2002, a single clasp was sold in Germany for €175 

If you are interested in obtaining this clasp, my best advice is:  Purchase only from a dealer who specialized in Imperial German medals and will offer you a 100% guarantee.  For your convenience, other associated guides can be found at:  http://reviews.ebay.com/Imperial-German-Medal-Guides-Index_W0QQugidZ10000000002386112  and/or  http://reviews.ebay.com/Imperial-German-Colonial-Medal-DEUTSCH-NEUGUINEA_W0QQugidZ10000000002379852.  Please visit my blog (http://blogs.ebay.com/tsa-li) for further information.  Thank you for your visit!