The S.210 was developed from the single-engined S.205 and was an all-metal low-wing cantilever monoplane with a retractable tricycle landing gear.

It was powered by two 200 hp (149 kW) Avco Lycoming TIO-360-A1B engines, one mounted on the leading edge of each wing.

The prototype S.210M first flew on 18 February 1970 and was exhibited at the 1971 Paris Air Show wearing a military style colour scheme and markings.

This aircraft was followed by an improved second prototype with increased baggage capacity and enlarged rear windows.

Data from Jane's All The World's Aircraft 1971-72 [1]General characteristics Performance