X-370, X-300 and Seagull DF-300 are the same. X-300 is all black as the one I saw; DF-300, a licensed copy from the Chinese manufacture, is in the same colors of X-370 as shown here. Other colones include Carena DF-300, Carena SX-300, Centon DF-300, Kalimar KX 5000 and 7000 (aperture setting displayed in the finder), and Vivitar V50. These colonies use cheaper materials and have slightly modified right-hand grips. Minolta also released a X-370N and X-300S with modified grip and switches of power and AEL/Timer.