During the late 1970s, Jan Nahum developed several prototypes and worked on new Anadol designs. Many of these new prototypes, which even included full-scale models, however, could not be mass-produced. Otosan, in that period, aimed at creating modern cars, in line with the developments of the automotive industry worldwide, while reducing the amount of fiberglass which it used for building the body parts of its vehicles. To meet this demand, Jan Nahum designed and built two different prototypes of the Anadol Cagdas (meaning Contemporary or Modern). The bodywork of Cagdas was made of fiberglass parts fitted on a steel skeleton. The Wankel engine developed by Claude (Klod) Nahum was installed on it. Cagdas won the top prize of the Turkish State Fine Arts Academy in Istanbul in the industrial design category, and Jan Nahum received the award from Prof. Dr. Onder Kucukerman. Turkish newspapers made detailed coverage of the car, stating that production would begin either in 1980 or 1981. However, due to the political, social and economic instability in the country, the project could never be realized.

A single prototype of Cagdas is today displayed at the Rahmi M. Koç Museum in Istanbul.

Another Cagdas prototype drawings and studies. It's sure that these studies have been inspired by Citroen CX, produced between 1974-1991...