Prototype for the model was a well-known service boat "Sigma" that was built at Leningrad Experimental Sport Boat Plant since 1986 and replacing very popular boat "Rhythm". Boat was intended for service at water sport competitions but became popular as a small pleasure boat. Boat design reflects an aesthetic mode of middle 80th. Because of small dimensions (only 152 mm in length) we have paid a special attention to minor details. Model was built for private collection.