I could not find dates on these, but the models and designs look very similar to the 1969 brochure, so I can only guess these are from around 1969. Each of these models are similar to the M-series forward control designs.
The “Jeep” Campeardo is reflective of the M-676; just a basic forward control truck:
This “Jeep” Duplex has four doors and a small truck bed, similar to the M-677:
The “Jeep” Toledo is similar to the M-678:
This “Jeep” Furgon has few windows than the Toledo model above, sort of like the M-679:
