I have a 105 and a 105C, both marked "MADE IN JAPAN". I haven't really looked at them, but do know that they have different porting between the two. I am guessing them to be 1.2 to 1.4 cubic inch displacment. It is possible that they can be produced by KIORITZ(sp). I also have a John Deere 40V chainsaw that has the KIORITZ name, but ordered a seal for it from a JD agency and was told it is an ECHO. Let us know what you find out.