I see the casting is also drilled and tapped through the mounting boss for the central gearbox adjuster...It is therefore probable that at some point it has been modified to fit either into either a just pre war B series frame or a post war 1946-47 B31...These machines have the central adjuster and narrower gaps between the gearbox mounting plates...Where are you based?.....Ian

Hi Ian
Thanks for the feedback. I was thinking there had to be a good reason why someone has made these mods. I’m based in Australia

email (option): Shaneambrose@hotmail.com

As Ian has highlighted it’s been modified to fit the “ narrow “ gearbox plates / box on the 46/48 B series

That box perhaps wasn’t the greatest being based on a pre war design - so when they eventually started giving bother - military surplus boxes were a plenty & cheap

Cut the mount lugs & off you go

I have seen quite a few over the years

Br
Job

email (option): Jonnyob1atgooglemail.com

I should think you could come up with a gearbox case relatively easily in your part of the world....Many of the M20s we lent you weren't sent back...!!:laughing: ...Ian

Shane
I have a spare shell, I’m in Melbourne if that helps

Hi Darren
Yes I’m interested in the shell. Can you please send me details at the email address below

email (option): Shaneambrose@hotmail.com