Direct Connection 340 block 1971
Early DC blocks were based on the T/A casting, and to the best of my knowledge had no outward identifiers except the T.A. in the casting number. Not positive on that, though- that was a long time ago...
Early DC blocks were based on the T/A casting, and to the best of my knowledge had no outward identifiers except the T.A. in the casting number. Not positive on that, though- that was a long time ago...