Though they didn’t write me back personally, the seller has amended their listing for Powell flute #106 to include the following info:
On Mar-31-08 at 11:00:04 PDT, seller added the following information:
Upon further inspection, we are all in agreement that this was always an off-set g and never an in-line G.
Here is a closeup of the converted G# mechanism:
(http://www.kesslermusic.com/auction/Powell106/g/topg.jpg)
Also, since posting the info, the sole bid has been retracted.