...This particular Blau 110mm Aluminum Fuel Cap came out of a 917 and was given to me by Gustav http://www.pbase.com/917carl/image/22303465 who brought it all the way from Germany on a recent visit (Gustav was here to help build a 917K from the ground-up! See those photos here http://www.pbase.com/917carl - Don't miss that photo gallery!). Thanks again Gustav!