TL, I have not been able to open any of the pics, so certainly will take your word for it.
This makes sense, because the Allison 250 turboshaft is actually the after market engine fitted to the Cessna 210 and the Cessna 206. I have flown the 206 version, and it definately was the turboshaft engine, even though driving a propellor.
Thanks for the correction and I will keep trying to open up one of the photos.
Check 6