Ken you are correct it is a Ganley but have just found out not Howden, Denise Ganley said that her grandfather [her Uncle Howdens Dad ], had a bad arm, !! Could be the grandfather owned the Car
Howden told Denise that he never drove Horahora and that is Denis [ Denise' father driving, would be Howden at Matamata though, and seems like they used similar or even the same helmet .
Someone as in " Steve Sharp " has the Helmet or indeed a photo of it. I put the photo of Jim Palmer Lotus with a Buckler behind it on "Buckler cars and Karts " Fb page and got more info.
The Helmet