The Böcek (Bug) was designed by Jan Nahum, who, in that period, worked at Otosan's Design and Development Department. Bocek made it to the showrooms in 1975.

The vehicle, similar in appearance to Volkswagen's "Buggy" versions but different in design concept and characteristics, was developed upon request for a similar vehicle by the Turkish Armed Forces. Otosan also predicted that the rising popularity of Turkey's tourism and beach resorts would guarantee a certain level of demand for a civilian-use version of such a vehicle. The Bocek's roof could be opened, it didn't have any doors, and its front window had the same inclinement with the hood. This continuous inclinement was a new concept which was later used by the future SUVs. The futuristic front panel and gauges of the Bocek were also ahead of its time, and were used many years later by future passenger vehicles in Europe.The Bocek had a 54 HP (5500 rpm) 1298cc Ford Kent Crossflow OHV cast iron block engine, also used in A1 and A2 models, which provided a very good performance given the vehicle's small dimensions. In line with the pop-art designs of that period, the Bocek had an asymmetrical front and rear appearance. The front grille was not symmetrical, while in the rear there were 3 stop lights at left and 2 at right. A front mirror, which was formed of 5 different angled mirrors which provided a telescopic view, was mounted on top of the windshield. The front tyres were 225*55*13 in dimension, while the seats were of fiberglass covered with vinyl, which was also something new for that period. Even though the dashboard was different, there were the same simple Smiths gauges: on the left a speedometer and on the right another gauge with water temperature and fuel indicators.The 4-seat body is built from fibre glass and affixed to an shortened H-frame chassis. The chassis has independent front suspension utilising coil springs and leaf springs on a live axle for the rear. Brake system is mono hyrolic system with disc in the front and drum in the rear. Hand brake, replaced between front seats, is mechanical. Brake lever connected by a cable to another lever at rear axle. Cluch system is cable. Gear box with cast iron block, is Ford type 2 model with manual trasmission. Steering system is rack and pinion.

Several different versions of the Bocek (Bug) were designed for institutional and civilian use. There was a version with gull-wing doors, a version for TV channels which was optimized for using film and video cameras, an offroad version, a tractor/trailer version and a military version.The Bocek was a design concept that was ahead of its time, and just like the STC-16, it could not reach high sales figures due to the economic situation in Turkey and the rest of the world in that period, caused mostly by the global oil crisis. Only 202 examples of Bocek were produced in 1975 and 1 special sample in 1977, which makes total 203.