[chris455]

Taurus, Poncho, please refer to the links below.
It would appear that all models D through N had this style of throttle handle (The silver thingy):


http://uscockpits.com/Early%20Fighters/ ... erbolt.jpg

Another:
http://uscockpits.com/Early%20Fighters/ ... bolt21.jpg

And still another, this time an N model:
http://uscockpits.com/Early%20Fighters/ ... rbolt2.JPG

Sorry I couldn't do any better than this