You have roughly, 3 kinds of koummiya
1/ the 19th ones with a good blade, most of the time a bayonet or a piece of a sword, good grip, good pommel
2/ the 1900-20ties ones with new material such as amber/bakelit
with very often a stamp on the ricasso
3/ the post 1950-60ties like the ones above
http://www.vikingsword.com/ethsword/guide.html