CGT with body 7A2

[Van Hove Herman]

Hi,

A 25 PDR spare firing platform is normally stored on the roof
of the CGT Cab 12 with body 7A2.
It is hold down with 2 upper-and 2 rear locking mechanisms,
with a fastening eyebolt,a clamp plate and an adjusting
handle in the middle of the platform.
The n°9 type firing platform I have has a non-removable
center stud with nut and no center hole.
Is it possible there was an earlier type of platform with a center
hole only without stud ?
Please more details about it !

cheers