Interesting points! Although there's also a saloon/vestibule door lock switch, which would imply that it might be a 442 after all? I wonder if somebody was contemplating some future mods?!There’s some things that don’t look right. Couple and uncouple buttons yet there were no automatic couplers for the electrics or brakes. Just a Buckeye, external brake pipes and a 27 way jumper.
Passcomm override when the 442 passcomm is the standard Mk3 handle that directly vents the brake pipe.