To be honnest I dont know.
I am the second owner, maybe it has been added after. It was already here when I bought it.
Serila Number is 21x0995052
The big visual difference (if I am right ) btw first and next/last adroit generation(by trek)were the internal cable routing on down tube, chainstay.... http://www.oldklein.com/history/evolution
Re: 1996 KLEIN Adroit Burgundy Blue / XTR M900 / size 21 / MINT
Serial Number : 21x0995052
21 are Klein inches.
X is "Adroit" like T was Attitude
09 is month of productoin
95 is the year
052 is number of the bike off the production line.
I think.