Funny thing, I’m just building one now:
The vehicles in your photo are very interesting, because they are “the missing link” between early and late V100s. The early ones had angulat wheel cutouts (that tended to crack where the angles were) and two vision ports forward of the side doors. The later ones had rounded wheel cutouts and only one vision block forward of the side doors. And the ones on the original photo have rounded wheel cutouts, but two vision blocks on the side - interesting mix of features.
Thanks for posting the photo and have a nice day
Paweł