CH24 or not...  

No offense taken.
And yes, a person with little or no knowledge can easily be fooled by counterfeit products... But maybe I'm misunderstanding your point, since that's hardly news.

Clint,
Price has nothing to do with the fact that it is real or not....i also bought 10 years ago 3 alvar Aalto fantables, coffee tables, for yes 15 dollars...they had charged me 45 for 3 then they had a chat together and decided that no it was 15 dollars for 3..... they return me 30 dollars and as it was already registered, they asked me if i wanted to get other things for these 30$ instead....i took 2 Florence knoll sideboard from the 1950's....each 15$.......and all was real Clint .....i sold years later the 3 alvar aalto tables for 11.000 $....it was a record at the time.....as far as your CH chairs, they look real to me although i have never seen this kind of logo for CH

I have 2 old CH25 chairs from Hans Wegner and would like to know if the initials engraved BK are the initials of the craftman as they do for example at the impérial manufacture of Sèvres In France ? If so do you know the name of this craftman......and is 65 the year of production ? This would verify What We know but want to be sure... there is also á silver sticker of Carl Hansen
Thank you

BK is the "code" of the craftsman who made the chair.
65 is the year of production.