We have just received a new book,
EDGED WEAPONS in the collection of the Russian museum of Ethnography (ISBN 5-7331-0341-8). Many interesting items.
I was glad to find in the book the three following swords and took the liberty to post them here:
#1 is defined as
Kopesh, Iranian or Kurds(?) Length 24 ½ inches
#2 is also defined as
Kopesh, Iranian Turks or Kurds(?), length 24 ½ inches
#3 is defined as
Saber “Shoi” or Kopesh, Kazakhastan, length 29 inches.
I believe they are all more of the same: Variations of the Black Sea Yataghan. #2 looks as if converted from a Bayonet blade. #3 is most interesting as it has the Black Sea Yataghan classical blade with a classical Turkish Yataghan handle.
I do not know if this clarify more or add to the confusion around these swords but it is definitely very interesting.