The YT-1930 was a moderately successful YT series light freighter that was released by the Corellian Engineering Corporation shortly before the Battle of Yavin.
The design of the YT-1930 was a variant on the successful YT-1300 light freighter, but placed the cockpit along the center line of the ship, and added two wedge-shaped cargo areas at the rear to double the cargo capacity of its predecessor. Most came with a single laser cannon turret. Though some considered it to be the pinnacle of the YT series, the YT-1930 never gained the following the older freighter design had.
http://starwars.wikia.com/wiki/YT-1930