I have had a flight helmet in my collection for a few years now and it has a service number written in the interior, but I have been unable to put a name to the number. It is difficult to determine the first number (or possibly a letter if he was indeed Canadian like I presume) I believe its something like a 2, 3, C, or even J. followed by 65266 and has the letters DFLT or possibly DCLT underneath, possibly his initials? I will try and add a photo of the actual writing. Any help figuring out who this individual was would be greatly appreciated.