You are looking at a dual point distributor from a 58 Corvette with 283 and dual quads. It is #1110891 and dated 7G26 which is July 26, 1957 for the 58 model year. Correct for 1958 Corvette 283 220 HP, 245 HP and 270 HP. Spins free. Points look usable. A good core for your restoration.