Well, lucky you, Lucky! Sorry for the lame pun. Couldn't let it go.

I note the "domed" Bings and Brembo calipers which would indicate an '82 or later model year. What birthday does your VIN say? The twin disc brakes were usually found only on the North American imported LS model R65s or some Euro-sold models. The seat's tail piece is also standard fitment on the R65.
I'm sure you will enjoy a lighter weight R65 without the extra load of the fairing and lowers. And that seat... well.
I do see a "peanut" rocker box cover peeking out from under a towel in amongst your collection. Share with us or we may have to sic Nurse Ratched on you.
The R65s (and R80s) are fantastic urban assault vehicles. The shorter wheelbase, lighter weight and quick handling in traffic will impress you; particularly if your primary Airhead experiences have been with their bigger brothers.
The bags and rack are a bonus as is the ride-off stand. Some light touring in your future?
You already know the post-adoption drill with a new-to-you Airhead. Keep us posted on your progress and thanks for the photos. Us asylum inmates live for R65 porn.