I'm not sure whether I understand you, but I'm talking about the Tentetsuki, not the newer 1 lane to 4 lane switch.
Second generation on the left, first generation on the right: (Do you see those grooves and the longer lever on the second generation? They don't appear on the first generation)
Second generation on the left, first generation on the right: (Do you see those grooves and the longer lever on the second generation? They don't appear on the first generation)