Thats definately a jet turbine at 4m08 in the video you can also see the prop hub is still attached with broken blade stubs. Which means this must be a turboprop aircraft.
The Twin Bonanza and Queen Air are piston engined aircraft.

This has got to be a King Air C90.

Its defo a turboprop engine….we have found both engines….and its crystal clear that its a turboprop.

Did you notice anything else which will assist as to verify the type of the aircraft?

3. Seawreck mentioned Bendix avionics and I think that a wreck placed for recreational purposes would have been stripped of all avionics.

Correct !!!

Remember that the nose cone appears to missing from the wreck.

Yes…..the nose cone is missing….

One more photo in order to make it more complex.

This photo shows a glass window on the belly of the aircraft. Is it common to have glass areas on a civil aircraft?

By edge, do you mean the wing tip? (IE the very end, tip).

Here is the only photo I can find of a T44 from below:
http://farm4.static.flickr.com/3298/3537509057_e358ce549b.jpg

I think, however, we are dealing with a civil version of the King Air C90.
The instructions you have pictured would most likely appear on military and civil versions, I cannot read all of the text but it is a Caution notice. Possibly to do with the hot oil and plumbing in the engine nacelle?

As has been mentioned, a military version will have been recovered for investigation, especialy from such an accessible depth.

My bet is on a drug runner ditching due to difficulties, pilot error (flying too low) or forced down by coast guard.

Wow !!

Drug runners etc !! you make its more exciting now !!

Ok lets see now a few things…..Dont be so sure that all military aircrafts are recovered for investigation….its a practice….but there are always expemtions. During the dive I noticed that the aircraft has no paint. It has this alu military cover which you meet mostly on aircrafts of 60s and 70s

Also….next to caution there is the word PLUMBING….therefore I think you are correct.

As far as concerns the wing edge (wing tip) you are correct again…

From a random web site

The King Air B200C equipped with cameras, cargo doors and special mission systems, is in service with the armed forces of Greece.

The wreck has not a “T” tail.

http://www.sea-wrecks.gr/gallery/index.php?iID=514

My only objection to King Air C90, is that the wreck main wheels seem to retract backwards. Just look at the wheel base next to the diver in the first 2 photos in the thread. There may be something broken and it just looks that way or maybe not. Seawreck, you’ve been there. Do the main wheels retract forwards or backwards?

Disclaimer: I know nothing about civil aircraft. I just look and compare photos.

Forwards….

I know its a bit confusing since one wheel seems to retract back and the other is standing like a forward. The one which is standing is just because some fishing nets were caught.

If you look carefully at the engine you will see that the engine has a rounded shape in order to allow the wheel to fit.

Me too.

Please click on the following link in order to see more photos of the wreck

http://www.sea-wrecks.gr/gallery/index.php?fID=18

Also, if you hit the following link you will see the rear wings of the aircraft which are familiar with a Beech 99 and not King….

http://www.sea-wrecks.gr/gallery/index.php?iID=514

I really look forward for your comments.