Hi!
Russian military bayonets don't have sign CCCP or AK-47 like your.
Only serial № on blade, scabbard and handle.
for example
http://www.nissanpatrol.com.au/forum...chmentid=36082
there are official types of bayonets for Kalashnikov
1949
http://www.nissanpatrol.com.au/forum...013/10/153.jpg
1956 experimental
http://www.nissanpatrol.com.au/forum...013/10/154.jpg
1959
http://www.nissanpatrol.com.au/forum...013/10/155.jpg
1978
http://www.nissanpatrol.com.au/forum...013/10/156.jpg
1989
http://www.nissanpatrol.com.au/forum...013/10/157.jpg
More photo here http://rusknife.com/topic/5316-%D1%8...0%D0%BA%D0%BC/
May be this is demilitarized Eastern European type, or Chinese, they also produced AK and many other things lol