OK, so now we have established that it is very likely a 60 series gearbox.

Does it have a conventional shift pattern, like this?
1 3 5
l--l--l
2 4 R

Or does it have a dogleg shift pattern like this?
R 2 4
l--l--l
1 3 5

Since no mods are required, it must be a right drive model with cable actuated clutch.